WO2016121939A1 - 変倍光学系、光学機器及び変倍光学系の製造方法 - Google Patents
変倍光学系、光学機器及び変倍光学系の製造方法 Download PDFInfo
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- WO2016121939A1 WO2016121939A1 PCT/JP2016/052683 JP2016052683W WO2016121939A1 WO 2016121939 A1 WO2016121939 A1 WO 2016121939A1 JP 2016052683 W JP2016052683 W JP 2016052683W WO 2016121939 A1 WO2016121939 A1 WO 2016121939A1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/144—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only
- G02B15/1445—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only the first group being negative
- G02B15/144511—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only the first group being negative arranged -+-+
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/145—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having five groups only
- G02B15/1455—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having five groups only the first group being negative
- G02B15/145527—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having five groups only the first group being negative arranged -+-++
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/146—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having more than five groups
- G02B15/1465—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having more than five groups the first group being negative
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/64—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
- G02B27/646—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image compensating for small deviations, e.g. due to vibration or shake
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
Definitions
- the present invention relates to a variable magnification optical system, an optical apparatus, and a method for manufacturing the variable magnification optical system.
- variable magnification optical system is required to be an optical system having a brighter F value while having good optical performance.
- a variable magnification optical system includes a first lens group having a negative refractive power and a second lens group having a positive refractive power, and is disposed closer to the image side than the second lens group.
- An anti-vibration lens group that is disposed on the image side of the intermediate group and is configured to be movable so as to have a component orthogonal to the optical axis, and at least the first lens group And changing the distance between the second lens group and the second lens group and the intermediate group, zooming is performed, and the following conditional expression is satisfied.
- f (1 to Gn) t the combined focal length from the first lens group to the intermediate group in the telephoto end state
- ft focal length of the entire system in the telephoto end state.
- a variable magnification optical system includes a first lens group having a negative refractive power and a second lens group having a positive refractive power, arranged in order from the object side,
- An anti-vibration lens group configured to be movable so as to have a component orthogonal to the axis, and at least a distance between the first lens group and the second lens group, and the second lens group and the second lens group.
- the zooming is performed by changing the distance from the n lens group, and the following conditional expression is satisfied. 1.000 ⁇ f (1 to Gn) t / ft ⁇ 100.000 However, f (1 to Gn) t: the combined focal length from the first lens group to the nth lens group in the telephoto end state, ft: focal length of the entire system in the telephoto end state.
- An optical apparatus includes the above-described variable magnification optical system.
- a method for manufacturing a variable power optical system is a method for manufacturing a variable power optical system having a first lens group having a negative refractive power and a second lens group having a positive refractive power. And an intermediate group disposed on the image side of the second lens group, disposed on the image side of the intermediate group, and configured to be movable so as to have a component perpendicular to the optical axis.
- f (1 to Gn) t the combined focal length from the first lens group to the intermediate group in the telephoto end state
- ft focal length of the entire system in the telephoto end state.
- a method for manufacturing a variable magnification optical system includes a first lens group having negative refractive power and a second lens group having positive refractive power, which are arranged in order from the object side.
- a method of manufacturing a variable magnification optical system comprising: an nth lens group that is disposed on the image side of the second lens group and has a negative refracting power that is fixed in a direction orthogonal to the optical axis; An anti-vibration lens group disposed on the image side from the n-th lens group and configured to be movable so as to have a component orthogonal to the optical axis, and at least the first lens group and the second lens group; And changing the distance between the second lens group and the n-th lens group, zooming is performed, and each lens is arranged in the lens barrel so as to satisfy the following conditional expression.
- f (1 to Gn) t the combined focal length from the first lens group to the nth lens group in the telephoto end state
- ft focal length of the entire system in the telephoto end state.
- (W), (M), and (T) are cross-sectional views of the zoom optical system according to the first example in the wide-angle end state, the intermediate focal length state, and the telephoto end state, respectively.
- (A), (b), and (c) are various aberration diagrams at the time of focusing at infinity in the wide-angle end state, the intermediate focal length state, and the telephoto end state of the variable magnification optical system according to the first example. is there.
- (A), (b), and (c) perform image blur correction at the time of focusing at infinity in the wide-angle end state, the intermediate focal length state, and the telephoto end state of the variable magnification optical system according to the first example, respectively.
- (W), (M), and (T) are cross-sectional views of the zoom optical system according to the second example in the wide-angle end state, the intermediate focal length state, and the telephoto end state, respectively.
- (A), (b), and (c) are various aberration diagrams during focusing at infinity in the wide-angle end state, intermediate focal length state, and telephoto end state of the variable magnification optical system according to the second example. is there.
- (A), (b), and (c) perform image blur correction at the time of focusing at infinity in the wide-angle end state, the intermediate focal length state, and the telephoto end state of the variable magnification optical system according to the second example.
- (W), (M), and (T) are sectional views of the zoom optical system according to the third example in the wide-angle end state, the intermediate focal length state, and the telephoto end state, respectively.
- (A), (b), and (c) are various aberration diagrams at the time of focusing at infinity in the wide-angle end state, the intermediate focal length state, and the telephoto end state of the variable magnification optical system according to the third example. is there.
- (A), (b), and (c) perform image blur correction at the time of focusing at infinity in the wide-angle end state, the intermediate focal length state, and the telephoto end state of the variable magnification optical system according to the third example.
- (W), (M), and (T) are cross-sectional views of the zoom optical system according to the fourth example in the wide-angle end state, the intermediate focal length state, and the telephoto end state, respectively.
- (A), (b), and (c) are various aberration diagrams during focusing at infinity in the wide-angle end state, the intermediate focal length state, and the telephoto end state of the variable magnification optical system according to the fourth example. is there.
- (A), (b), and (c) perform image blur correction at the time of focusing at infinity in the wide-angle end state, the intermediate focal length state, and the telephoto end state of the zoom optical system according to the fourth example, respectively.
- (W), (M), and (T) are cross-sectional views of the zoom optical system according to the fifth example in the wide-angle end state, the intermediate focal length state, and the telephoto end state, respectively.
- (A), (b), and (c) are various aberration diagrams during focusing at infinity in the wide-angle end state, the intermediate focal length state, and the telephoto end state of the variable magnification optical system according to the fifth example. is there.
- (A), (b), and (c) perform image blur correction at the time of focusing at infinity in the wide-angle end state, the intermediate focal length state, and the telephoto end state of the variable magnification optical system according to the fifth example.
- (W), (M), and (T) are sectional views of the zoom optical system according to the sixth example in the wide-angle end state, the intermediate focal length state, and the telephoto end state, respectively.
- (A), (b), and (c) are various aberration diagrams at the time of focusing at infinity in the wide-angle end state, the intermediate focal length state, and the telephoto end state of the variable magnification optical system according to the sixth example. is there.
- (A), (b), and (c) perform image blur correction at the time of focusing at infinity in the wide-angle end state, the intermediate focal length state, and the telephoto end state of the variable magnification optical system according to the sixth example.
- (W), (M), and (T) are sectional views of the zoom optical system according to the seventh example in the wide-angle end state, the intermediate focal length state, and the telephoto end state, respectively.
- (A), (b), and (c) are various aberration diagrams at the time of focusing at infinity in the wide-angle end state, the intermediate focal length state, and the telephoto end state of the variable magnification optical system according to the seventh example. is there.
- (A), (b), and (c) perform image blur correction at the time of focusing at infinity in the wide-angle end state, the intermediate focal length state, and the telephoto end state of the zoom optical system according to the seventh example, respectively.
- (W), (M), and (T) are sectional views of the variable magnification optical system according to the eighth example in the wide-angle end state, the intermediate focal length state, and the telephoto end state, respectively.
- (A), (b), and (c) are various aberration diagrams at the time of focusing at infinity in the wide-angle end state, the intermediate focal length state, and the telephoto end state of the variable magnification optical system according to the eighth example. is there.
- (A), (b), and (c) perform image blur correction at the time of focusing at infinity in the wide-angle end state, intermediate focal length state, and telephoto end state of the variable magnification optical system according to the eighth example.
- (W), (M), and (T) are sectional views of the variable magnification optical system according to Example 9 in the wide-angle end state, the intermediate focal length state, and the telephoto end state, respectively.
- (A), (b), and (c) are various aberration diagrams at the time of focusing at infinity in the wide-angle end state, the intermediate focal length state, and the telephoto end state of the variable magnification optical system according to the ninth example. is there.
- (A), (b), and (c) perform image blur correction at the time of focusing at infinity in the wide-angle end state, the intermediate focal length state, and the telephoto end state of the variable magnification optical system according to the ninth example.
- (W), (M), and (T) are sectional views of the zoom optical system according to the tenth example in the wide-angle end state, the intermediate focal length state, and the telephoto end state, respectively.
- (A), (b), and (c) are various aberration diagrams at the time of focusing at infinity in the wide-angle end state, the intermediate focal length state, and the telephoto end state of the variable magnification optical system according to the tenth example. is there.
- (A), (b), and (c) perform image blur correction at the time of focusing at infinity in the wide-angle end state, the intermediate focal length state, and the telephoto end state of the zoom optical system according to the tenth example, respectively.
- (W), (M), and (T) are cross-sectional views of the zoom optical system according to the eleventh example in the wide-angle end state, the intermediate focal length state, and the telephoto end state, respectively.
- (A), (b), and (c) are various aberration diagrams during focusing at infinity in the wide-angle end state, intermediate focal length state, and telephoto end state of the variable magnification optical system according to the eleventh example. is there.
- (A), (b), and (c) perform image blur correction at the time of focusing at infinity in the wide-angle end state, the intermediate focal length state, and the telephoto end state of the variable magnification optical system according to the eleventh example.
- FIG. 1 It is a figure which shows an example of a structure of the camera carrying a variable magnification optical system. It is a figure which shows the outline of an example of the manufacturing method of a variable magnification optical system.
- FIG. 1 shows an example of the configuration of the variable magnification optical system ZL.
- the number of lens groups, the lens configuration in each lens group, and the like can be changed as appropriate.
- variable magnification optical system ZL includes a first lens group G1 having a negative refractive power and a second lens group G2 having a positive refractive power, and is closer to the image side than the second lens group G2.
- An anti-vibration lens group VR which has an arranged intermediate group (nth lens group) Gn, is arranged on the image side of the intermediate group Gn, and is configured to be movable so as to have a component orthogonal to the optical axis. Then, zooming is performed by changing at least the distance between the first lens group G1 and the second lens group G2 and the distance between the second lens group G2 and the intermediate group Gn.
- the intermediate group Gn has a fixed position in the direction orthogonal to the optical axis and can have a negative refractive power.
- the 31st lens is used as an intermediate group Gn having a negative refractive power that is fixed in a direction perpendicular to the optical axis, and an anti-vibration lens group VR disposed on the image side of the intermediate group.
- the group G31 and the 32nd lens group G32 correspond respectively.
- the anti-vibration lens group VR arranged on the intermediate group Gn and the image side of the intermediate group the thirty-first lens group G31 and the thirty-second lens group Applicable to G32.
- the fourth lens group G4 and the fifth lens group G5 correspond to the intermediate group Gn and the anti-vibration lens group VR disposed on the image side of the intermediate group.
- the anti-vibration lens group VR preferably has a negative refractive power.
- variable magnification optical system ZL includes a negative positive / negative positive or negative positive / negative positive / positive lens group, and realizes a variable magnification optical system having a wide angle of view by changing at least the distance between these groups. be able to.
- the negative intermediate group Gn and the (negative) anti-vibration lens group VR are provided on the image side of the intermediate group, and the anti-vibration lens group VR is moved so as to have a component in a direction orthogonal to the optical axis.
- variable magnification optical system ZL satisfies the following conditional expression (1). 1.000 ⁇ f (1 to Gn) t / ft ⁇ 100.000 (1) However, f (1 to Gn) t: composite focal length from the first lens group G1 to the intermediate group Gn in the telephoto end state, ft: focal length of the entire system in the telephoto end state.
- Conditional expression (1) returns the incident light converged by the first lens group G1 and the second lens group G2 to a substantially parallel light beam (substantially afocal light beam) in the intermediate group Gn, and returns to the anti-vibration lens group VR.
- This is a conditional expression for improving the anti-vibration performance.
- a bright F-number of about F2.8 to F3.5 can be secured, and various aberrations including spherical aberration can be corrected well.
- conditional expression (1) If the upper limit of conditional expression (1) is exceeded, the power of the intermediate group Gn becomes too large, and correction for various aberrations such as spherical aberration by the intermediate group Gn becomes insufficient, and a zoom ratio of about 3 times or more is obtained. It becomes difficult.
- conditional expression (1) In order to ensure the effect, it is preferable that the upper limit value of conditional expression (1) is 50.000. In order to ensure the effect, it is preferable that the upper limit value of the conditional expression (1) is 25.000.
- conditional expression (1) In order to ensure the effect, it is preferable that the lower limit value of conditional expression (1) is 1.500. In order to ensure the effect, it is preferable that the lower limit value of the conditional expression (1) is 2.000.
- variable magnification optical system ZL preferably satisfies the following conditional expression (2). 1.360 ⁇ -f (Gn to G (VR)) w / fw ⁇ 5.000 (2) However, f (Gn to G (VR)) w: composite focal length from the intermediate group Gn to the image stabilizing lens group VR in the wide-angle end state, fw: focal length of the entire system in the wide-angle end state.
- Conditional expression (2) is a condition for achieving both a zoom ratio of about 3 times and good optical performance by appropriately setting the combined focal length in the wide-angle end state of the intermediate group Gn and the anti-vibration lens group VR. It is a formula. By satisfying conditional expression (2), a bright F-number of about F2.8 to F3.5 can be secured, and various aberrations including spherical aberration can be corrected well.
- conditional expression (2) If the upper limit value of conditional expression (2) is exceeded, the combined refractive power of the intermediate group Gn and the anti-vibration lens group VR becomes too small, and it becomes difficult to secure a zoom ratio of about 3 times in the entire system. As a result, it becomes necessary for the second lens group G2 and other groups to perform zooming, and as a result, correction of spherical aberration and coma becomes insufficient.
- conditional expression (2) In order to ensure the effect, it is preferable to set the upper limit of conditional expression (2) to 4.000. In order to ensure the effect, it is preferable that the upper limit value of conditional expression (2) is 3.000.
- conditional expression (2) If the lower limit value of conditional expression (2) is not reached, the combined refractive power of the intermediate group Gn and the anti-vibration lens group VR becomes too large, and it becomes difficult to correct spherical aberration and coma. As a result, it is difficult to realize good imaging performance while increasing the F value to about F2.8 to F3.5.
- conditional expression (2) is 1.400. In order to ensure the effect, it is preferable that the lower limit value of the conditional expression (2) is 1.450.
- the variable magnification optical system ZL has an image side lens group RP having the strongest positive refractive power among the lens groups having positive refractive power arranged on the image side from the image stabilizing lens group VR. It is preferable that the interval between the RP and the vibration-proof lens group VR changes during zooming and satisfies the following conditional expression (3). 0.400 ⁇ f (RP) / f (FP) ⁇ 2,000 (3) However, f (RP): focal length of the image side lens unit RP, f (FP): the combined focal length in the wide-angle end state of the lens disposed on the image plane side from the first lens group G1 and disposed on the object side from the intermediate group Gn.
- Conditional expression (3) is a conditional expression for achieving both a zoom ratio of about 3 times and good optical performance by appropriately setting the refractive power of the image side lens unit RP.
- conditional expression (3) a bright F-number of about F2.8 to F3.5 can be secured, and various aberrations including spherical aberration can be corrected well.
- conditional expression (3) If the upper limit of conditional expression (3) is exceeded, it will be insufficient to change the magnification by the image side lens unit RP, and it will be difficult to secure a zoom ratio of about 3 times in the entire system. As a result, it becomes necessary for the second lens group G2 and other groups to perform zooming, and as a result, correction of spherical aberration and coma becomes insufficient.
- conditional expression (3) is 1.800. In order to ensure the effect, it is preferable that the upper limit value of the conditional expression (3) is 1.700.
- conditional expression (3) If the lower limit of conditional expression (3) is not reached, the refractive power of the image side lens unit RP becomes too large, and it becomes difficult to correct spherical aberration and coma. As a result, it is difficult to realize good imaging performance while increasing the F value to about F2.8 to F3.5.
- conditional expression (3) In order to ensure the effect, it is preferable that the lower limit value of conditional expression (3) is 0.500. In order to ensure the effect, it is preferable that the lower limit value of the conditional expression (3) is 0.600.
- the intermediate group Gn preferably has at least one positive lens component and one negative lens component.
- Lens component means a single lens or a cemented lens.
- the spherical aberration and coma aberration can be corrected satisfactorily in the intermediate group Gn, which can contribute to the improvement of the image stabilization performance.
- the intermediate group Gn is composed of only one of the lens components, spherical aberration and coma aberration correction in the intermediate group Gn is insufficient, and it is necessary for the vibration-proof lens group VR to perform correction of those aberrations. appear.
- the vibration-proof lens group VR As a result, the occurrence of decentration coma aberration or one-side blur that occurs during image blur correction increases, and it is difficult to maintain good imaging performance during image blur correction.
- the intermediate group Gn has at least two negative lens components and one or more positive lens components.
- the second lens group G2 has at least four lens components.
- the second lens group G2 which can contribute to the improvement of the image stabilization performance.
- the second lens group G2 is composed of three or less lens components, spherical aberration and coma aberration correction in the second lens group G2 becomes insufficient, and as a result, the intermediate group Gn is responsible for correcting these aberrations. Need to be generated. As a result, the occurrence of decentration coma aberration or one-side blur that occurs during image blur correction increases, and it is difficult to maintain good imaging performance during image blur correction.
- the second lens group G2 has at least five or more lens components.
- the second lens group G2 includes a twenty-first lens group G21 having a positive refractive power and a twenty-second lens group G22 having a positive refractive power, which are arranged in order from the object side. It is preferable to perform focusing from infinity to a close object by moving the 21 lens group G21 to the image side as a focusing lens group.
- the lens group to be moved at the time of focusing can be reduced in size and weight, and the entire lens system can be downsized and the focusing speed at the time of autofocusing can be increased.
- variable magnification optical system ZL preferably satisfies the following conditional expression (4). 10.00 ° ⁇ t ⁇ 30.00 ° (4) However, ⁇ t: Half field angle in the telephoto end state.
- Conditional expression (4) is a condition that defines the value of the half angle of view in the telephoto end state. By satisfying conditional expression (4), a desired angle of view can be obtained, and coma, distortion, and field curvature can be favorably corrected.
- conditional expression (4) is 27.00 °. In order to ensure the effect, it is preferable that the upper limit value of conditional expression (4) is 24.00 °.
- conditional expression (4) is 11.00 °. In order to ensure the effect, it is preferable that the lower limit value of the conditional expression (4) is 12.00 °.
- variable magnification optical system ZL preferably satisfies the following conditional expression (5). 30.00 ° ⁇ w ⁇ 50.00 ° (5) However, ⁇ w: Half angle of view in the wide angle end state.
- Conditional expression (5) is a condition that defines the value of the half angle of view in the wide-angle end state. By satisfying conditional expression (5), a desired angle of view can be obtained, and coma, distortion, and field curvature can be favorably corrected.
- conditional expression (5) is 48.00 °. In order to make the effect more reliable, it is preferable that the upper limit value of the conditional expression (5) is 45.00 °.
- conditional expression (5) be 32.00 °. In order to ensure the effect, it is preferable that the lower limit value of the conditional expression (5) is 34.00 °.
- the distance between the twenty-first lens group G21 and the twenty-second lens group G22 may be fixed or variable at the time of zooming.
- the interval between the intermediate group Gn and the anti-vibration lens group VR may be fixed or variable during variable magnification. In the case of fixing, it is preferable that the combined refractive power of the intermediate group Gn and the anti-vibration lens group VR can be negative.
- variable magnification optical system ZL it is preferable that the refractive power of the optical system including the lens disposed on the image side from the image stabilizing lens group VR is positive.
- variable magnification optical system ZL preferably has at least one lens group having positive refractive power on the image side from the image stabilizing lens group VR.
- variable magnification optical system ZL preferably has an aperture stop between the second lens group G2 and the intermediate group Gn.
- variable magnification optical system ZL having a bright F value, a wide angle of view, and various aberrations corrected satisfactorily.
- FIG. 37 shows an example of the configuration of a camera equipped with a variable magnification optical system.
- the camera 1 is an interchangeable lens camera (so-called mirrorless camera) provided with the above-described variable magnification optical system ZL as the photographing lens 2.
- this camera 1 light from an object (not shown) that is not shown is condensed by the taking lens 2, and then on the image pickup surface of the image pickup unit 3 via an OLPF (Optical Low Pass Filter) that is not shown.
- a subject image is formed on the screen.
- the subject image is photoelectrically converted by the photoelectric conversion element provided in the imaging unit 3 to generate an image of the subject.
- This image is displayed on an EVF (Electronic view finder) 4 provided in the camera 1.
- EVF Electronic view finder
- variable magnification optical system ZL mounted on the camera 1 as the photographing lens 2 has a bright F value, a wide angle of view, and various aberrations due to its characteristic lens configuration, as will be understood from each of the embodiments described later. And has good optical performance. Therefore, according to the camera 1, it is possible to realize an optical apparatus having a bright F value, a wide angle of view, various aberrations being favorably corrected, and good optical performance.
- the example of the mirrorless camera was demonstrated as the camera 1, it is not limited to this.
- the above zooming optical system ZL is mounted on a single-lens reflex camera that has a quick return mirror in the camera body and observes a subject with a viewfinder optical system, the same effect as the camera 1 can be obtained. Can do.
- FIG. 38 shows an example of a manufacturing method of the variable magnification optical system ZL.
- each lens is arranged in the lens barrel so as to have a first lens group G1 having a negative refractive power and a second lens group G2 having a positive refractive power (step ST10).
- Each lens is arranged so as to have an intermediate group Gn arranged on the image side from the second lens group G2 (step ST20).
- Each lens is arranged so as to have an anti-vibration lens group VR arranged on the image side from the intermediate group Gn and configured to be movable so as to have a component orthogonal to the optical axis (step ST30).
- Each lens is arranged so as to perform zooming by changing at least the distance between the first lens group G1 and the second lens group G2 and the distance between the second lens group G2 and the intermediate group Gn (step) ST40).
- Each lens is arranged so as to satisfy the following conditional expression (1) (step ST50). 1.000 ⁇ f (1 to Gn) t / ft ⁇ 100.000 (1)
- f (1 to Gn) t composite focal length from the first lens group G1 to the intermediate group Gn in the telephoto end state
- ft focal length of the entire system in the telephoto end state.
- a first lens group G1 and a biconvex lens L21, a positive meniscus lens L22 having a convex surface facing the object side, a cemented lens of a biconvex lens L23 and a biconcave lens L24, and a biconvex lens L25 are arranged.
- the twenty-first lens group G21 includes a biconvex lens L26, which serves as a twenty-second lens group G22.
- a biconcave lens L31, a negative meniscus lens L32 having a concave surface facing the object side, and a biconvex lens L33 are disposed.
- a biconcave lens L34 and a positive meniscus lens L35 having a convex surface facing the object side are arranged as a thirty-second lens group G32.
- L41, a cemented lens of a negative meniscus lens L42 having a concave surface facing the image side and a biconvex lens L43, and a cemented lens of a biconvex lens L44, a biconcave lens L45, and a positive meniscus lens L46 having a convex surface facing the object side are arranged.
- the fourth lens group G4 is obtained.
- the lens groups thus prepared are arranged in the above-described procedure to manufacture the variable magnification optical system ZL.
- variable magnification optical system ZL having a bright F value, a wide angle of view, and various aberrations corrected favorably.
- FIG. 11 is a cross-sectional view showing the configuration of ZL12) and refractive power distribution.
- the optical axis of each lens group when changing the magnification from the wide-angle end state (W) to the telephoto end state (T) through the intermediate focal length state (M) is shown.
- the moving direction along is indicated by an arrow.
- variable magnification optical systems ZL1 to ZL12 In the upper part of the sectional view of the variable magnification optical systems ZL1 to ZL12, the moving direction of the focusing lens group when focusing on an object at a short distance from infinity is indicated by an arrow, and the image stabilizing lens group for correcting image blurring The state of VR is also shown.
- each reference symbol for FIG. 1 according to the first embodiment is used independently for each embodiment in order to avoid complication of explanation due to an increase in the number of digits of the reference symbol. Therefore, even if the same reference numerals as those in the drawings according to the other embodiments are given, they are not necessarily in the same configuration as the other embodiments.
- Tables 1 to 12 are shown below. These are tables of specifications in the first to twelfth embodiments.
- d-line (wavelength 587.562 nm) and g-line (wavelength 435.835 nm) are selected as the calculation targets of the aberration characteristics.
- the surface number is the order of the optical surfaces from the object side along the light traveling direction
- R is the radius of curvature of each optical surface
- D is the next optical surface from each optical surface ( Or an optical plane distance to the image plane)
- n (d) is the refractive index of the optical member material with respect to the d-line
- ⁇ d is the Abbe number based on the d-line of the optical member material
- “Aperture” indicates an aperture stop S.
- the curvature radius “0.00000” indicates a plane in the case of a lens surface, and indicates an aperture or an aperture surface in the case of a stop.
- the optical surface is an aspherical surface
- the surface number is marked with *
- the column of curvature radius R indicates the paraxial curvature radius.
- f is the focal length of the entire lens system
- FNo is the F number
- ⁇ is the half angle of view (unit: °)
- Y is the maximum image height
- TL is the optical axis when focusing on infinity.
- the distance from the forefront lens to the last lens surface, BF is the distance from the last lens surface to the image plane I on the optical axis when focused at infinity, and BF (air equivalent) is the distance when focused at infinity.
- the distance from the last lens surface on the optical axis to the image plane I is expressed in terms of the air equivalent length.
- D0 is the axial air distance between the object surface and the lens surface on the most object side of the first lens group G1
- mm is generally used for the focal length f, the radius of curvature R, the surface interval D, and other lengths, etc. unless otherwise specified.
- the optical system is not limited to this because the same optical performance can be obtained even when proportional expansion or proportional reduction is performed.
- the unit is not limited to “mm”, and other appropriate units can be used.
- variable magnification optical system ZL (ZL1) includes a first lens group G1 having negative refractive power arranged in order from the object side, and a first lens group having positive refractive power.
- the first lens group G1 is composed of a negative meniscus lens L11 having a concave surface facing the image side, a biconcave lens L12, and a positive meniscus lens L13 having a convex surface facing the object side, which are arranged in order from the object side.
- the negative meniscus lens L11 has an aspheric image side surface.
- the biconcave lens L12 is a composite aspherical lens formed by forming a resin layer provided on the glass surface on the object side into an aspherical shape.
- the second lens group G2 is composed of a twenty-first lens group G21 (focusing lens group) having positive refractive power and a twenty-second lens group G22 having positive refractive power, which are arranged in order from the object side.
- the twenty-first lens group G21 includes a biconvex lens L21, a positive meniscus lens L22 having a convex surface directed toward the object side, a cemented lens of a biconvex lens L23 and a biconcave lens L24, and a biconvex lens L25 arranged in order from the object side.
- the 22nd lens group G22 includes a biconvex lens L26.
- the third lens group G3 includes a thirty-first lens group G31 (intermediate group) that is arranged in order from the object side and has a negative refractive power and whose position in the direction orthogonal to the optical axis is fixed, and a thirty-second lens that has a negative refractive power. It consists of a group G32 (anti-vibration lens group).
- the thirty-first lens group G31 includes a biconcave lens L31, a negative meniscus lens L32 having a concave surface directed toward the object side, and a biconvex lens L33 arranged in order from the object side.
- the thirty-second lens group G32 includes a biconcave lens L34 arranged in order from the object side, and a positive meniscus lens L35 having a convex surface directed toward the object side.
- the fourth lens group G4 includes a biconvex lens L41 arranged in order from the object side, a cemented lens of a negative meniscus lens L42 having a concave surface facing the image side, and a biconvex lens L43, a biconvex lens L44, a biconcave lens L45, and the object side. And a cemented lens with a positive meniscus lens L46 having a convex surface facing the surface.
- the biconvex lens L41 has an aspheric object side surface.
- the positive meniscus lens L46 has an aspheric image side surface.
- a first flare cut stop FC1 and an aperture stop S arranged in order from the object side are provided between the second lens group G2 and the third lens group G3. Between the fourth lens group G4 and the image plane I, a second flare cut stop FC2 is provided.
- the first lens group G1 is once moved to the image side and then moved to the object side so that the distance between the lens groups changes, and the second lens group G2 is moved. This is done by moving to the object side, moving the third lens group G3 once to the image side, then moving to the object side, and moving the fourth lens group G4 to the object side.
- the first flare cut stop FC1, the aperture stop S, and the second flare cut stop FC2 are fixed at the time of zooming.
- Focusing from infinity to a close object is performed by moving the 21st lens group G21 to the image side as a focusing lens group.
- image blur correction on the image plane I is performed by moving the thirty-second lens group G32 as a vibration-proof lens group VR so as to have a component orthogonal to the optical axis.
- the image stabilization coefficient ratio of the amount of image movement on the imaging surface to the amount of movement of the moving lens group in shake correction
- K rotational blurring at an angle ⁇ is used.
- the image stabilization coefficient in the wide-angle end state, is ⁇ 0.45 and the focal length is 24.80 mm. Therefore, the image stabilization lens group VR for correcting the rotation blur of 0.30 degrees is used.
- the amount of movement is -0.29 mm.
- the image stabilization coefficient In the intermediate focal length state, the image stabilization coefficient is ⁇ 0.51 and the focal length is 50.01 mm. Therefore, the movement amount of the image stabilization lens group VR for correcting the rotation blur of 0.30 degrees is ⁇ 0. 51 mm.
- the image stabilization coefficient In the telephoto end state, the image stabilization coefficient is ⁇ 0.58 and the focal length is 67.85 mm, so that the movement amount of the image stabilization lens group VR for correcting the rotation blur of 0.30 degrees is ⁇ 0. 61 mm.
- Table 1 below shows the values of each item in the first example.
- Surface numbers 1 to 40 in Table 1 correspond to the optical surfaces m1 to m40 shown in FIG.
- variable magnification optical system ZL1 satisfies the conditional expressions (1) to (5).
- FIG. 2 is a diagram showing various aberrations (spherical aberration diagram, astigmatism diagram, distortion diagram, lateral chromatic aberration diagram, and lateral aberration diagram) at the time of focusing on infinity of the variable magnification optical system ZL1 according to the first example.
- (A) shows a wide-angle end state
- (b) shows an intermediate focal length state
- (c) shows a telephoto end state.
- 3A and 3B are lateral aberration diagrams when image blur correction is performed at the time of focusing on infinity of the variable magnification optical system ZL1 according to the first example.
- FIG. 3A is a wide-angle end state
- FIG. 3B is an intermediate focus.
- the distance state, (c) shows the telephoto end state.
- FNO represents the F number
- Y represents the image height
- d indicates the d-line
- g indicates the aberration at the g-line.
- those without these descriptions show aberrations at the d-line.
- the value of the F number corresponding to the maximum aperture is shown.
- the solid line indicates the sagittal image plane
- the broken line indicates the meridional image plane.
- variable magnification optical system ZL1 has excellent optical performance with various aberrations corrected well from the wide-angle end state to the telephoto end state. . It can also be seen that high image forming performance is achieved even during image blur correction.
- variable magnification optical system ZL (ZL2) includes a first lens group G1 having negative refractive power arranged in order from the object side, and a first lens group G1 having positive refractive power.
- the first lens group G1 is composed of a negative meniscus lens L11 having a concave surface facing the image side, a biconcave lens L12, and a positive meniscus lens L13 having a convex surface facing the object side, which are arranged in order from the object side.
- the negative meniscus lens L11 has an aspheric image side surface.
- the biconcave lens L12 is a composite aspherical lens formed by forming a resin layer provided on the glass surface on the object side into an aspherical shape.
- the second lens group G2 is composed of a twenty-first lens group G21 (focusing lens group) having positive refractive power and a twenty-second lens group G22 having positive refractive power, which are arranged in order from the object side.
- the twenty-first lens group G21 includes a biconvex lens L21, a positive meniscus lens L22 having a convex surface directed toward the object side, a cemented lens of a biconvex lens L23 and a biconcave lens L24, and a biconvex lens L25 arranged in order from the object side.
- the 22nd lens group G22 includes a biconvex lens L26.
- the third lens group G3 includes a thirty-first lens group G31 (intermediate group) that is arranged in order from the object side and has a negative refractive power and whose position in the direction orthogonal to the optical axis is fixed, and a thirty-second lens that has a negative refractive power. It consists of a group G32 (anti-vibration lens group).
- the thirty-first lens group G31 includes a biconcave lens L31, a negative meniscus lens L32 having a concave surface directed toward the object side, and a biconvex lens L33 arranged in order from the object side.
- the thirty-second lens group G32 includes a biconcave lens L34 arranged in order from the object side, and a positive meniscus lens L35 having a convex surface directed toward the object side.
- the biconcave lens L34 has an aspheric object side surface.
- the fourth lens group G4 includes a biconvex lens L41 arranged in order from the object side, a cemented lens of a negative meniscus lens L42 having a concave surface facing the image side, and a biconvex lens L43, a biconvex lens L44, a biconcave lens L45, and the object side. And a cemented lens with a positive meniscus lens L46 having a convex surface facing the surface.
- the biconvex lens L41 has an aspheric object side surface.
- the positive meniscus lens L46 has an aspheric image side surface.
- An aperture stop S is provided between the second lens group G2 and the third lens group G3.
- a flare cut stop FC is provided between the fourth lens group G4 and the image plane I.
- the first lens group G1 is once moved to the image side and then moved to the object side so that the distance between the lens groups changes, and the second lens group G2 is moved. This is done by moving to the object side, moving the third lens group G3 once to the image side, then moving to the object side, and moving the fourth lens group G4 to the object side.
- the aperture stop S and the flare cut stop FC are fixed at the time of zooming.
- Focusing from infinity to a close object is performed by moving the 21st lens group G21 to the image side as a focusing lens group.
- image blur correction on the image plane I is performed by moving the thirty-second lens group G32 as a vibration-proof lens group VR so as to have a component orthogonal to the optical axis.
- the image stabilization coefficient ratio of the amount of image movement on the imaging surface to the amount of movement of the moving lens group in shake correction
- K rotational blurring at an angle ⁇ is used.
- the image stabilization coefficient is ⁇ 0.44 and the focal length is 24.80 mm in the wide-angle end state.
- the amount of movement is -0.30 mm.
- the image stabilization coefficient is ⁇ 0.50 and the focal length is 47.76 mm. .50 mm.
- the image stabilization coefficient is ⁇ 0.58, and the focal length is 67.85 mm. 62 mm.
- Table 2 shows the values of each item in the second example.
- Surface numbers 1 to 39 in Table 2 correspond to the respective optical surfaces m1 to m39 shown in FIG.
- variable magnification optical system ZL2 satisfies the conditional expressions (1) to (5).
- FIG. 5 is a diagram illustrating various aberrations (spherical aberration diagram, astigmatism diagram, distortion diagram, lateral chromatic aberration diagram, and lateral aberration diagram) of the variable magnification optical system ZL2 according to the second example when focusing on infinity.
- (A) shows a wide-angle end state
- (b) shows an intermediate focal length state
- (c) shows a telephoto end state.
- 6A and 6B are lateral aberration diagrams when image blur correction is performed at the time of focusing on infinity of the variable magnification optical system ZL2 according to the second example.
- FIG. 6A is a wide-angle end state
- FIG. 6B is an intermediate focus.
- the distance state, (c) shows the telephoto end state.
- variable magnification optical system ZL2 has good optical performance with various aberrations corrected well from the wide-angle end state to the telephoto end state. . It can also be seen that high image forming performance is achieved even during image blur correction.
- variable magnification optical system ZL (ZL3) includes a first lens group G1 having negative refractive power arranged in order from the object side, and a first lens group having positive refractive power.
- the second lens group G2 includes a third lens group G3 having a negative refractive power, a fourth lens group G4 having a positive refractive power, and a fifth lens group G5 having a positive refractive power.
- the first lens group G1 is composed of a negative meniscus lens L11 having a concave surface facing the image side, a biconcave lens L12, and a positive meniscus lens L13 having a convex surface facing the object side, which are arranged in order from the object side.
- the negative meniscus lens L11 has an aspheric image side surface.
- the biconcave lens L12 is a composite aspherical lens formed by forming a resin layer provided on the glass surface on the object side into an aspherical shape.
- the second lens group G2 is composed of a twenty-first lens group G21 (focusing lens group) having positive refractive power and a twenty-second lens group G22 having positive refractive power, which are arranged in order from the object side.
- the twenty-first lens group G21 includes a biconvex lens L21, a positive meniscus lens L22 having a convex surface directed toward the object side, a cemented lens of a biconvex lens L23 and a biconcave lens L24, and a biconvex lens L25 arranged in order from the object side.
- the 22nd lens group G22 includes a biconvex lens L26.
- the third lens group G3 includes a thirty-first lens group G31 (intermediate group) that is arranged in order from the object side and has a negative refractive power and whose position in the direction orthogonal to the optical axis is fixed, and a thirty-second lens that has a negative refractive power. It consists of a group G32 (anti-vibration lens group).
- the thirty-first lens group G31 includes a biconcave lens L31, a negative meniscus lens L32 having a concave surface directed toward the object side, and a biconvex lens L33 arranged in order from the object side.
- the thirty-second lens group G32 includes a biconcave lens L34 arranged in order from the object side, and a positive meniscus lens L35 having a convex surface directed toward the object side.
- the biconcave lens L34 has an aspheric object side surface.
- the fourth lens group G4 includes a biconvex lens L41 arranged in order from the object side, a cemented lens of a negative meniscus lens L42 having a concave surface directed toward the image side, and a biconvex lens L43, and a cemented lens of the biconvex lens L44 and the biconcave lens L45. It consists of a lens.
- the biconvex lens L41 has an aspheric object side surface.
- the biconcave lens L45 has an aspheric image side surface.
- the fifth lens group G5 is composed of a cemented lens which is arranged in order from the object side and includes a positive meniscus lens L51 having a convex surface directed toward the object side and a negative meniscus lens L52 having a concave surface directed toward the image side.
- An aperture stop S is provided between the second lens group G2 and the third lens group G3.
- the first lens group G1 is once moved to the image side and then moved to the object side so that the distance between the lens groups changes, and the second lens group G2 is moved. This is done by moving to the object side, moving the third lens group G3 once to the image side, then moving to the object side, and moving the fourth lens group G4 to the object side.
- the fifth lens group G5 and the aperture stop S are fixed at the time of zooming.
- Focusing from infinity to a close object is performed by moving the 21st lens group G21 to the image side as a focusing lens group.
- image blur correction on the image plane I is performed by moving the thirty-second lens group G32 as a vibration-proof lens group VR so as to have a component orthogonal to the optical axis.
- the image stabilization coefficient ratio of the amount of image movement on the imaging surface to the amount of movement of the moving lens group in shake correction
- K rotational blurring at an angle ⁇ is used.
- the image stabilization coefficient is ⁇ 0.45 and the focal length is 24.82 mm in the wide-angle end state.
- the amount of movement is -0.29 mm.
- the image stabilization coefficient is ⁇ 0.50 and the focal length is 47.49 mm. Therefore, the movement amount of the image stabilization lens group VR for correcting the rotation blur of 0.30 degrees is ⁇ 0. 49 mm.
- the image stabilization coefficient is ⁇ 0.58 and the focal length is 67.84 mm. 62 mm.
- Table 3 shows the values of each item in the third example.
- Surface numbers 1 to 40 in Table 3 correspond to the respective optical surfaces m1 to m40 shown in FIG.
- variable magnification optical system ZL3 satisfies the conditional expressions (1) to (5).
- FIG. 8 is a diagram illustrating various aberrations (spherical aberration diagram, astigmatism diagram, distortion diagram, lateral chromatic aberration diagram, and lateral aberration diagram) at the time of focusing on infinity of the variable magnification optical system ZL3 according to Example 3.
- (A) shows a wide-angle end state
- (b) shows an intermediate focal length state
- (c) shows a telephoto end state.
- 9A and 9B are lateral aberration diagrams when image blur correction is performed at the time of focusing on infinity of the variable magnification optical system ZL3 according to the third example, where FIG. 9A is a wide-angle end state and FIG. 9B is an intermediate focus.
- the distance state, (c) shows the telephoto end state.
- variable magnification optical system ZL3 has good optical performance with various aberrations corrected well from the wide-angle end state to the telephoto end state. . It can also be seen that high image forming performance is achieved even during image blur correction.
- variable magnification optical system ZL (ZL4) includes a first lens group G1 having negative refractive power arranged in order from the object side, and a first lens group having positive refractive power.
- the sixth lens group G6 includes a seventh lens group G7 having a negative refractive power.
- the first lens group G1 is composed of a negative meniscus lens L11 having a concave surface facing the image side, a biconcave lens L12, and a positive meniscus lens L13 having a convex surface facing the object side, which are arranged in order from the object side.
- the negative meniscus lens L11 has an aspheric image side surface.
- the biconcave lens L12 is a composite aspherical lens formed by forming a resin layer provided on the glass surface on the object side into an aspherical shape.
- the second lens group G2 (focusing lens group) includes a biconvex lens L21, a positive meniscus lens L22 having a convex surface facing the object side, a cemented lens of a biconvex lens L23 and a biconcave lens L24, and a biconvex lens L25. .
- the third lens group G3 is composed of a biconvex lens L31.
- the fourth lens group G4 (intermediate group) is fixed at a position orthogonal to the optical axis, and is arranged in order from the object side, a biconcave lens L41, a negative meniscus lens L42 with a concave surface facing the object side, Consists of a convex lens L43.
- the fifth lens group G5 (anti-vibration lens group) includes a biconcave lens L51 arranged in order from the object side, and a positive meniscus lens L52 having a convex surface directed toward the object side.
- the biconcave lens L51 has an aspheric object side surface.
- the sixth lens group G6 includes a biconvex lens L61 arranged in order from the object side, a cemented lens of a negative meniscus lens L62 having a concave surface directed to the image side and a biconvex lens L63, and a cemented lens of the biconvex lens L64 and the biconcave lens L65. It consists of a lens.
- the biconvex lens L61 has an aspheric object side surface.
- the biconcave lens L65 has an aspheric image side surface.
- the seventh lens group G7 is composed of a cemented lens which is arranged in order from the object side and includes a positive meniscus lens L71 having a convex surface directed toward the object side and a negative meniscus lens L72 having a concave surface directed toward the image side.
- An aperture stop S is provided between the third lens group G3 and the fourth lens group G4.
- the first lens group G1 is once moved to the image side and then moved to the object side so that the distance between the lens groups changes, and the second lens group G2 is moved.
- Move to the object side move the third lens group G3 to the object side, move the fourth lens group G4 once to the image side, then move to the object side, and move the fifth lens group G5 once to the image side Then, it is moved to the object side, and the sixth lens group G6 is moved to the object side.
- the seventh lens group G7 and the aperture stop S are fixed at the time of zooming.
- Focusing from infinity to a close object is performed by moving the second lens group G2 to the image side as a focusing lens group.
- image blur correction on the image plane I is performed by moving the fifth lens group G5 as a vibration-proof lens group VR so as to have a component orthogonal to the optical axis.
- the image stabilization coefficient ratio of the amount of image movement on the imaging surface to the amount of movement of the moving lens group in shake correction
- K rotational blurring at an angle ⁇ is used.
- the image stabilization coefficient in the wide-angle end state, is ⁇ 0.46 and the focal length is 25.49 mm. The amount of movement is -0.29 mm. In the intermediate focal length state, the image stabilization coefficient is ⁇ 0.53 and the focal length is 48.81 mm. Therefore, the movement amount of the image stabilization lens group VR for correcting the rotation blur of 0.30 degrees is ⁇ 0. 49 mm. In the telephoto end state, the image stabilization coefficient is ⁇ 0.61 and the focal length is 69.45 mm. 59 mm.
- Table 4 shows the values of each item in the fourth example.
- Surface numbers 1 to 40 in Table 4 correspond to the optical surfaces m1 to m40 shown in FIG.
- variable magnification optical system ZL4 satisfies the conditional expressions (1) to (5).
- FIG. 11 is a diagram showing various aberrations (spherical aberration diagram, astigmatism diagram, distortion diagram, lateral chromatic aberration diagram, and lateral aberration diagram) at the time of focusing on infinity of the variable magnification optical system ZL4 according to Example 4.
- (A) shows a wide-angle end state
- (b) shows an intermediate focal length state
- (c) shows a telephoto end state.
- FIG. 12 is a lateral aberration diagram when image blur correction is performed at the time of focusing on infinity of the variable magnification optical system ZL4 according to the fourth example, where (a) is a wide-angle end state, and (b) is an intermediate focus.
- the distance state, (c) shows the telephoto end state.
- variable magnification optical system ZL4 has good optical performance with various aberrations corrected well from the wide-angle end state to the telephoto end state. . It can also be seen that high image forming performance is achieved even during image blur correction.
- variable magnification optical system ZL (ZL5) includes a first lens group G1 having negative refractive power arranged in order from the object side, and a first lens group G1 having positive refractive power.
- the second lens group G2 includes a third lens group G3 having a negative refractive power, a fourth lens group G4 having a positive refractive power, and a fifth lens group G5 having a positive refractive power.
- the first lens group G1 is composed of a negative meniscus lens L11 having a concave surface facing the image side, a biconcave lens L12, and a positive meniscus lens L13 having a convex surface facing the object side, which are arranged in order from the object side.
- the negative meniscus lens L11 has an aspheric image side surface.
- the biconcave lens L12 is a composite aspherical lens formed by forming a resin layer provided on the glass surface on the object side into an aspherical shape.
- the second lens group G2 is composed of a twenty-first lens group G21 (focusing lens group) having positive refractive power and a twenty-second lens group G22 having positive refractive power, which are arranged in order from the object side.
- the twenty-first lens group G21 includes a biconvex lens L21, a positive meniscus lens L22 having a convex surface directed toward the object side, a cemented lens of a biconvex lens L23 and a biconcave lens L24, and a biconvex lens L25 arranged in order from the object side.
- the 22nd lens group G22 includes a biconvex lens L26.
- the third lens group G3 includes an aperture stop S arranged in order from the object side, a thirty-first lens group G31 (intermediate group) having a negative refractive power and a fixed position in the direction orthogonal to the optical axis, and a negative refractive power. And a thirty-second lens group G32 (anti-vibration lens group).
- the thirty-first lens group G31 includes a biconcave lens L31, a negative meniscus lens L32 having a concave surface directed toward the object side, and a biconvex lens L33 arranged in order from the object side.
- the thirty-second lens group G32 includes a biconcave lens L34 arranged in order from the object side, and a positive meniscus lens L35 having a convex surface directed toward the object side.
- the biconcave lens L34 has an aspheric object side surface.
- the fourth lens group G4 includes a biconvex lens L41 arranged in order from the object side, a cemented lens of a negative meniscus lens L42 having a concave surface directed toward the image side, and a biconvex lens L43, and a cemented lens of the biconvex lens L44 and the biconcave lens L45. It consists of a lens.
- the biconvex lens L41 has an aspheric object side surface.
- the biconcave lens L45 has an aspheric image side surface.
- the fifth lens group G5 is composed of a cemented lens of a biconvex lens L51 and a biconcave lens L52, which are arranged in order from the object side.
- the first lens group G1 In zooming from the wide-angle end state to the telephoto end state, the first lens group G1 is once moved to the image side and then moved to the object side so that the distance between the lens groups changes, and the second lens group G2 is moved. This is done by moving to the object side and moving the fourth lens group G4 to the object side.
- the third lens group G3 and the fifth lens group G5 are fixed at the time of zooming.
- Focusing from infinity to a close object is performed by moving the 21st lens group G21 to the image side as a focusing lens group.
- image blur correction on the image plane I is performed by moving the thirty-second lens group G32 as a vibration-proof lens group VR so as to have a component orthogonal to the optical axis.
- the image stabilization coefficient ratio of the amount of image movement on the imaging surface to the amount of movement of the moving lens group in shake correction
- K rotational blurring at an angle ⁇ is used.
- the image stabilization lens group VR for correcting rotational blur of 0.30 degrees is used.
- the amount of movement is -0.28 mm.
- the image stabilization coefficient is ⁇ 0.52 and the focal length is 47.50 mm. Therefore, the movement amount of the image stabilization lens group VR for correcting the rotation blur of 0.30 degrees is ⁇ 0. 48 mm.
- the image stabilization coefficient is ⁇ 0.58, and the focal length is 67.85 mm. 62 mm.
- Table 5 below shows the values of each item in the fifth example.
- Surface numbers 1 to 40 in Table 5 correspond to the optical surfaces m1 to m40 shown in FIG.
- variable magnification optical system ZL5 satisfies the conditional expressions (1) to (5).
- FIG. 14 is a diagram showing various aberrations (spherical aberration diagram, astigmatism diagram, distortion diagram, lateral chromatic aberration diagram, and lateral aberration diagram) at the time of focusing on infinity of the variable magnification optical system ZL5 according to Example 5, (A) shows a wide-angle end state, (b) shows an intermediate focal length state, and (c) shows a telephoto end state.
- FIGS. 15A and 15B are lateral aberration diagrams when performing image blur correction at the time of focusing on infinity of the variable magnification optical system ZL5 according to Example 5, where FIG. 15A is a wide-angle end state, and FIG. 15B is an intermediate focus. The distance state, (c) shows the telephoto end state.
- variable magnification optical system ZL5 has good optical performance with various aberrations corrected well from the wide-angle end state to the telephoto end state. . It can also be seen that high image forming performance is achieved even during image blur correction.
- variable magnification optical system ZL (ZL6) includes a first lens group G1 having negative refractive power arranged in order from the object side, and a first lens group having positive refractive power.
- the sixth lens group G6 includes a seventh lens group G7 having a positive refractive power.
- the first lens group G1 is composed of a negative meniscus lens L11 having a concave surface facing the image side, a biconcave lens L12, and a positive meniscus lens L13 having a convex surface facing the object side, which are arranged in order from the object side.
- the negative meniscus lens L11 has an aspheric image side surface.
- the biconcave lens L12 is a composite aspherical lens formed by forming a resin layer provided on the glass surface on the object side into an aspherical shape.
- the second lens group G2 (focusing lens group) includes a biconvex lens L21, a positive meniscus lens L22 having a convex surface facing the object side, a cemented lens of a biconvex lens L23 and a biconcave lens L24, and a biconvex lens L25. .
- the third lens group G3 is composed of a biconvex lens L31.
- the fourth lens group G4 (intermediate group) has a fixed position in the direction orthogonal to the optical axis, and is arranged in order from the object side, with an aperture stop S, a biconcave lens L41, and a negative meniscus with a concave surface facing the object side. It consists of a lens L42 and a biconvex lens L43.
- the fifth lens group G5 (anti-vibration lens group) includes a biconcave lens L51 arranged in order from the object side, and a positive meniscus lens L52 having a convex surface directed toward the object side.
- the biconcave lens L51 has an aspheric object side surface.
- the sixth lens group G6 includes a biconvex lens L61 arranged in order from the object side, a cemented lens of a negative meniscus lens L62 having a concave surface directed to the image side and a biconvex lens L63, and a cemented lens of the biconvex lens L64 and the biconcave lens L65. It consists of a lens.
- the biconvex lens L61 has an aspheric object side surface.
- the biconcave lens L65 has an aspheric image side surface.
- the seventh lens group G7 is composed of a cemented lens of a biconvex lens L71 and a biconcave lens L72 arranged in order from the object side.
- the first lens group G1 is once moved to the image side and then moved to the object side so that the distance between the lens groups changes, and the second lens group G2 is moved.
- Move to the object side move the third lens group G3 to the object side, move the fourth lens group G4 to the image side, move the fifth lens group G5 once to the image side, and then move to the object side
- the sixth lens group G6 is moved to the object side.
- the seventh lens group G7 is fixed at the time of zooming.
- Focusing from infinity to a close object is performed by moving the second lens group G2 to the image side as a focusing lens group.
- image blur correction on the image plane I is performed by moving the fifth lens group G5 as a vibration-proof lens group VR so as to have a component orthogonal to the optical axis.
- the image stabilization coefficient ratio of the amount of image movement on the imaging surface to the amount of movement of the moving lens group in shake correction
- K rotational blurring at an angle ⁇ is used.
- the image stabilization coefficient in the wide-angle end state, is ⁇ 0.46 and the focal length is 24.73 mm. The amount of movement is -0.28 mm. In the intermediate focal length state, the image stabilization coefficient is ⁇ 0.53 and the focal length is 47.48 mm. Therefore, the movement amount of the image stabilization lens group VR for correcting the rotation blur of 0.30 degrees is ⁇ 0. 48 mm. In the telephoto end state, the image stabilization coefficient is ⁇ 0.58 and the focal length is 67.41 mm. 61 mm.
- Table 6 shows the values of each item in the sixth example.
- Surface numbers 1 to 40 in Table 6 correspond to the optical surfaces m1 to m40 shown in FIG.
- Table 6 shows that the variable magnification optical system ZL6 according to the sixth example satisfies the conditional expressions (1) to (5).
- FIG. 17 is a diagram illustrating various aberrations (spherical aberration diagram, astigmatism diagram, distortion diagram, lateral chromatic aberration diagram, and lateral aberration diagram) when the variable magnification optical system ZL6 according to Example 6 is focused at infinity.
- (A) shows a wide-angle end state
- (b) shows an intermediate focal length state
- (c) shows a telephoto end state.
- 18A and 18B are lateral aberration diagrams when performing image blur correction at the time of focusing on infinity of the variable magnification optical system ZL6 according to the sixth example.
- FIG. 18A is a wide-angle end state
- FIG. 18B is an intermediate focus.
- the distance state, (c) shows the telephoto end state.
- variable magnification optical system ZL6 has excellent optical performance with various aberrations corrected well from the wide-angle end state to the telephoto end state. . It can also be seen that high image forming performance is achieved even during image blur correction.
- variable magnification optical system ZL (ZL7) includes a first lens group G1 having negative refractive power arranged in order from the object side, and a first lens group having positive refractive power.
- the second lens group G2 includes a third lens group G3 having a negative refractive power, a fourth lens group G4 having a positive refractive power, and a fifth lens group G5 having a positive refractive power.
- the first lens group G1 is composed of a negative meniscus lens L11 having a concave surface facing the image side, a biconcave lens L12, and a positive meniscus lens L13 having a convex surface facing the object side, which are arranged in order from the object side.
- the negative meniscus lens L11 has an aspheric image side surface.
- the biconcave lens L12 is a composite aspherical lens formed by forming a resin layer provided on the glass surface on the object side into an aspherical shape.
- the second lens group G2 is composed of a twenty-first lens group G21 (focusing lens group) having positive refractive power and a twenty-second lens group G22 having positive refractive power, which are arranged in order from the object side.
- the 21st lens group G21 includes a positive meniscus lens L21 having a convex surface directed toward the object side, a biconvex lens L22, a biconcave lens L23, and a biconvex lens L24, which are arranged in order from the object side.
- the twenty-second lens group G22 includes a biconvex lens L25.
- the third lens group G3 includes an aperture stop S arranged in order from the object side, a thirty-first lens group G31 (intermediate group) having a negative refractive power and a fixed position in the direction orthogonal to the optical axis, and a negative refractive power. And a thirty-second lens group G32 (anti-vibration lens group).
- the thirty-first lens group G31 includes a biconcave lens L31, a negative meniscus lens L32 having a concave surface directed toward the object side, and a biconvex lens L33 arranged in order from the object side.
- the thirty-second lens group G32 includes a biconcave lens L34 arranged in order from the object side, and a positive meniscus lens L35 having a convex surface directed toward the object side.
- the biconcave lens L34 has an aspheric object side surface.
- the fourth lens group G4 is composed of a biconvex lens L41, a biconvex lens L42, and a cemented lens of a biconvex lens L43 and a biconcave lens L44, which are arranged in order from the object side.
- the biconvex lens L41 has an aspheric object side surface.
- the fifth lens group G5 is composed of a cemented lens composed of a negative meniscus lens L51 having a concave surface facing the image side and a positive meniscus lens L52 having a convex surface facing the object side, which are arranged in order from the object side.
- the first lens group G1 In zooming from the wide-angle end state to the telephoto end state, the first lens group G1 is once moved to the image side and then moved to the object side so that the distance between the lens groups changes, and the second lens group G2 is moved. This is done by moving to the object side and moving the fourth lens group G4 to the object side.
- the third lens group G3 and the fifth lens group G5 are fixed at the time of zooming.
- Focusing from infinity to a close object is performed by moving the 21st lens group G21 to the image side as a focusing lens group.
- image blur correction on the image plane I is performed by moving the thirty-second lens group G32 as a vibration-proof lens group VR so as to have a component orthogonal to the optical axis.
- the image stabilization coefficient ratio of the amount of image movement on the imaging surface to the amount of movement of the moving lens group in shake correction
- K rotational blurring at an angle ⁇ is used.
- the image stabilization coefficient in the wide-angle end state, is ⁇ 0.46 and the focal length is 24.77 mm. The amount of movement is -0.29 mm.
- the image stabilization coefficient In the intermediate focal length state, the image stabilization coefficient is ⁇ 0.52, and the focal length is 47.50 mm. 48 mm.
- the image stabilization coefficient In the telephoto end state, the image stabilization coefficient is ⁇ 0.58 and the focal length is 67.86 mm. 62 mm.
- Table 7 shows the values of each item in the seventh example.
- Surface numbers 1 to 38 in Table 7 correspond to the respective optical surfaces m1 to m38 shown in FIG.
- FIG. 20 is a diagram illustrating various aberrations (spherical aberration diagram, astigmatism diagram, distortion diagram, lateral chromatic aberration diagram, and lateral aberration diagram) at the time of focusing on infinity of the variable magnification optical system ZL7 according to Example 7, (A) shows a wide-angle end state, (b) shows an intermediate focal length state, and (c) shows a telephoto end state.
- FIG. 21 is a lateral aberration diagram when image blur correction is performed at the time of focusing on infinity of the variable magnification optical system ZL7 according to Example 7, where (a) is a wide-angle end state and (b) is an intermediate focus. The distance state, (c) shows the telephoto end state.
- variable magnification optical system ZL7 according to the seventh example has excellent optical performance with various aberrations corrected well from the wide-angle end state to the telephoto end state. . It can also be seen that high image forming performance is achieved even during image blur correction.
- variable magnification optical system ZL (ZL8) includes a first lens group G1 having negative refractive power arranged in order from the object side, and a first lens group having positive refractive power.
- the second lens group G2 includes a third lens group G3 having a negative refractive power, a fourth lens group G4 having a positive refractive power, and a fifth lens group G5 having a positive refractive power.
- the first lens group G1 is composed of a negative meniscus lens L11 having a concave surface facing the image side, a biconcave lens L12, and a positive meniscus lens L13 having a convex surface facing the object side, which are arranged in order from the object side.
- the negative meniscus lens L11 has an aspheric image side surface.
- the biconcave lens L12 is a composite aspherical lens formed by forming a resin layer provided on the glass surface on the object side into an aspherical shape.
- the second lens group G2 includes a flare-cut stop FC, a twenty-first lens group G21 (focusing lens group) having positive refractive power, and a twenty-second lens group G22 having positive refractive power, which are arranged in order from the object side. It consists of.
- the 21st lens group G21 includes a positive meniscus lens L21 having a convex surface directed toward the object side, a biconvex lens L22, a biconcave lens L23, and a biconvex lens L24, which are arranged in order from the object side.
- the twenty-second lens group G22 includes a biconvex lens L25.
- the third lens group G3 includes an aperture stop S arranged in order from the object side, a thirty-first lens group G31 (intermediate group) having a negative refractive power and a fixed position in the direction orthogonal to the optical axis, and a negative refractive power. And a thirty-second lens group G32 (anti-vibration lens group).
- the thirty-first lens group G31 includes a biconcave lens L31, a negative meniscus lens L32 having a concave surface directed toward the object side, and a biconvex lens L33 arranged in order from the object side.
- the thirty-second lens group G32 includes a biconcave lens L34 arranged in order from the object side, and a positive meniscus lens L35 having a convex surface directed toward the object side.
- the biconcave lens L34 has an aspheric object side surface.
- the fourth lens group G4 is composed of a positive meniscus lens L41 having a convex surface directed toward the image side, a biconvex lens L42, and a cemented lens of a biconvex lens L43 and a biconcave lens L44, which are arranged in order from the object side.
- the positive meniscus lens L41 has an aspheric object side surface.
- the fifth lens group G5 is composed of a cemented lens composed of a negative meniscus lens L51 having a concave surface facing the image side and a positive meniscus lens L52 having a convex surface facing the object side, which are arranged in order from the object side.
- the first lens group G1 In zooming from the wide-angle end state to the telephoto end state, the first lens group G1 is once moved to the image side and then moved to the object side so that the distance between the lens groups changes, and the second lens group G2 is moved. This is done by moving to the object side and moving the fourth lens group G4 to the object side.
- the third lens group G3 and the fifth lens group G5 are fixed at the time of zooming.
- Focusing from infinity to a close object is performed by moving the 21st lens group G21 to the image side as a focusing lens group.
- image blur correction on the image plane I is performed by moving the thirty-second lens group G32 as a vibration-proof lens group VR so as to have a component orthogonal to the optical axis.
- the image stabilization coefficient ratio of the amount of image movement on the imaging surface to the amount of movement of the moving lens group in shake correction
- K rotational blurring at an angle ⁇ is used.
- the image stabilization lens group VR for correcting rotational blur of 0.30 degrees is used.
- the amount of movement is -0.26 mm.
- the image stabilization coefficient is ⁇ 0.58 and the focal length is 47.50 mm. Therefore, the movement amount of the image stabilization lens group VR for correcting the rotation blur of 0.30 degrees is ⁇ 0. .43 mm.
- the image stabilization coefficient is ⁇ 0.66 and the focal length is 67.85 mm. 54 mm.
- Table 8 shows the values of each item in the eighth example.
- Surface numbers 1 to 39 in Table 8 correspond to the optical surfaces m1 to m39 shown in FIG.
- variable magnification optical system ZL8 satisfies the conditional expressions (1) to (5).
- FIG. 23 is a diagram illustrating various aberrations (spherical aberration diagram, astigmatism diagram, distortion diagram, lateral chromatic aberration diagram, and lateral aberration diagram) at the time of focusing on infinity of the variable magnification optical system ZL8 according to Example 8.
- (A) shows a wide-angle end state
- (b) shows an intermediate focal length state
- (c) shows a telephoto end state.
- FIG. 24 is a lateral aberration diagram when image blur correction is performed at the time of focusing on infinity of the variable magnification optical system ZL8 according to Example 8, where (a) is a wide-angle end state, and (b) is an intermediate focus.
- the distance state, (c) shows the telephoto end state.
- variable magnification optical system ZL8 has good optical performance with various aberrations corrected well from the wide-angle end state to the telephoto end state. . It can also be seen that high image forming performance is achieved even during image blur correction.
- variable magnification optical system ZL (ZL9) includes a first lens group G1 having negative refractive power arranged in order from the object side, and a first lens group having positive refractive power.
- the second lens group G2 includes a third lens group G3 having a negative refractive power, a fourth lens group G4 having a positive refractive power, and a fifth lens group G5 having a positive refractive power.
- the first lens group G1 is composed of a negative meniscus lens L11 having a concave surface facing the image side, a biconcave lens L12, and a positive meniscus lens L13 having a convex surface facing the object side, which are arranged in order from the object side.
- the negative meniscus lens L11 has an aspheric image side surface.
- the second lens group G2 is composed of a twenty-first lens group G21 (focusing lens group) having positive refractive power and a twenty-second lens group G22 having positive refractive power, which are arranged in order from the object side.
- the twenty-first lens group G21 includes a biconvex lens L21, a positive meniscus lens L22 having a convex surface directed toward the object side, a cemented lens of a biconvex lens L23 and a biconcave lens L24, and a biconvex lens L25 arranged in order from the object side.
- the 22nd lens group G22 is composed of a cemented lens which is arranged in order from the object side and includes a biconvex lens L26 and a negative meniscus lens L27 having a concave surface directed toward the object side.
- the third lens group G3 includes a thirty-first lens group G31 (intermediate group) that is arranged in order from the object side and has a negative refractive power and whose position in the direction orthogonal to the optical axis is fixed, and a thirty-second lens that has a negative refractive power. It consists of a group G32 (anti-vibration lens group).
- the thirty-first lens group G31 includes a biconcave lens L31 arranged in order from the object side, a negative meniscus lens L32 having a concave surface facing the object side, and a positive meniscus lens L33 having a convex surface facing the image side.
- the thirty-second lens group G32 is composed of a biconcave lens L34 and a biconvex lens L35 arranged in this order from the object side.
- the biconcave lens L34 is aspheric on both sides.
- the fourth lens group G4 is composed of a biconvex lens L41, a biconvex lens L42, and a cemented lens of a biconvex lens L43 and a biconcave lens L44, which are arranged in order from the object side.
- the biconvex lens L41 has an aspheric object side surface.
- the biconcave lens L44 has an aspheric image side surface.
- the fifth lens group G5 is composed of a cemented lens of a biconvex lens L51 and a biconcave lens L52, which are arranged in order from the object side.
- An aperture stop S is provided between the second lens group G2 and the third lens group G3.
- the first lens group G1 is once moved to the image side and then moved to the object side so that the distance between the lens groups changes, and the second lens group G2 is moved. This is done by moving to the object side, moving the third lens group G3 once to the image side, then moving to the object side, and moving the fourth lens group G4 to the object side.
- the fifth lens group G5 and the aperture stop S are fixed at the time of zooming.
- Focusing from infinity to a close object is performed by moving the 21st lens group G21 to the image side as a focusing lens group.
- image blur correction on the image plane I is performed by moving the thirty-second lens group G32 as a vibration-proof lens group VR so as to have a component orthogonal to the optical axis.
- the image stabilization coefficient ratio of the amount of image movement on the imaging surface to the amount of movement of the moving lens group in shake correction
- K rotational blurring at an angle ⁇ is used.
- the image stabilization lens group VR for correcting the rotational blur of 0.30 degrees is used.
- the amount of movement is -0.25 mm.
- the image stabilization coefficient is ⁇ 0.57 and the focal length is 47.50 mm. Therefore, the movement amount of the image stabilization lens group VR for correcting the rotation blur of 0.30 degrees is ⁇ 0. .43 mm.
- the image stabilization coefficient is ⁇ 0.66 and the focal length is 67.85 mm. 54 mm.
- Table 9 shows the values of each item in the ninth example.
- Surface numbers 1 to 39 in Table 9 correspond to the optical surfaces m1 to m39 shown in FIG.
- Table 9 shows that the variable magnification optical system ZL9 according to Example 9 satisfies the conditional expressions (1) to (5).
- FIG. 26 is a diagram illustrating various aberrations (spherical aberration diagram, astigmatism diagram, distortion diagram, lateral chromatic aberration diagram, and lateral aberration diagram) when the zoom optical system ZL9 according to Example 9 is in focus at infinity.
- (A) shows a wide-angle end state
- (b) shows an intermediate focal length state
- (c) shows a telephoto end state.
- 27A and 27B are lateral aberration diagrams when image blur correction is performed at the time of focusing on infinity of the variable magnification optical system ZL9 according to the ninth example.
- FIG. 27A is a wide-angle end state
- FIG. 27B is an intermediate focus.
- the distance state, (c) shows the telephoto end state.
- variable magnification optical system ZL9 has good optical performance with various aberrations corrected well from the wide-angle end state to the telephoto end state. . It can also be seen that high image forming performance is achieved even during image blur correction.
- the variable magnification optical system ZL (ZL10) includes a first lens group G1 having negative refractive power arranged in order from the object side, and a first lens group G1 having positive refractive power.
- the second lens group G2 includes a third lens group G3 having a negative refractive power, a fourth lens group G4 having a positive refractive power, and a fifth lens group G5 having a positive refractive power.
- the first lens group G1 includes, in order from the object side, a negative meniscus lens L11 having a concave surface facing the image side, a cemented lens of a positive meniscus lens L12 having a convex surface facing the object side, and a biconcave lens L13, and the object side. And a positive meniscus lens L14 having a convex surface.
- the negative meniscus lens L11 has an aspheric image side surface.
- the second lens group G2 is composed of a twenty-first lens group G21 (focusing lens group) having positive refractive power and a twenty-second lens group G22 having positive refractive power, which are arranged in order from the object side.
- the twenty-first lens group G21 includes a positive meniscus lens L21 having a convex surface directed toward the object side, a positive meniscus lens L22 having a convex surface directed toward the object side, and a biconvex lens L23 and a biconcave lens L24, which are arranged in order from the object side. It consists of a lens and a biconvex lens L25.
- the 22nd lens group G22 includes a biconvex lens L26.
- the positive meniscus lens L22 has an aspheric object side surface.
- the third lens group G3 includes an aperture stop S arranged in order from the object side, a thirty-first lens group G31 (intermediate group) having a negative refractive power and a fixed position in the direction orthogonal to the optical axis, and a negative refractive power. And a thirty-second lens group G32 (anti-vibration lens group).
- the thirty-first lens group G31 includes a biconcave lens L31 arranged in order from the object side, and a positive meniscus lens L32 having a convex surface directed toward the object side.
- the thirty-second lens group G32 includes a biconcave lens L33 arranged in order from the object side, and a positive meniscus lens L34 having a convex surface directed toward the object side.
- the biconcave lens L33 has an aspheric object side surface.
- the fourth lens group G4 includes a biconvex lens L41 arranged in order from the object side, a cemented lens of a negative meniscus lens L42 having a concave surface directed toward the image side, and a biconvex lens L43, and a cemented lens of the biconvex lens L44 and the biconcave lens L45. It consists of a lens.
- the biconvex lens L41 has an aspheric object side surface.
- the biconcave lens L45 has an aspheric image side surface.
- the fifth lens group G5 is composed of a cemented lens which is arranged in order from the object side and includes a positive meniscus lens L51 having a convex surface directed toward the object side and a negative meniscus lens L52 having a concave surface directed toward the image side.
- the first lens group G1 is once moved to the image side and then moved to the object side so that the distance between the lens groups changes, and the second lens group G2 is moved. This is done by moving to the object side, moving the third lens group G3 once to the image side, then moving to the object side, and moving the fourth lens group G4 to the object side.
- the fifth lens group G5 is fixed at the time of zooming.
- Focusing from infinity to a close object is performed by moving the 21st lens group G21 to the image side as a focusing lens group.
- image blur correction on the image plane I is performed by moving the thirty-second lens group G32 as a vibration-proof lens group VR so as to have a component orthogonal to the optical axis.
- the image stabilization coefficient ratio of the amount of image movement on the imaging surface to the amount of movement of the moving lens group in shake correction
- K rotational blurring at an angle ⁇ is used.
- the image stabilization coefficient in the wide-angle end state, is ⁇ 0.50 and the focal length is 24.77 mm. Therefore, the image stabilization lens group VR for correcting the rotational blur of 0.30 degrees is used.
- the amount of movement is -0.26 mm.
- the image stabilization coefficient In the intermediate focal length state, the image stabilization coefficient is ⁇ 0.57 and the focal length is 47.50 mm. Therefore, the movement amount of the image stabilization lens group VR for correcting the rotation blur of 0.30 degrees is ⁇ 0. 44 mm.
- the image stabilization coefficient In the telephoto end state, the image stabilization coefficient is ⁇ 0.66, and the focal length is 67.84 mm. 54 mm.
- Table 10 shows the values of each item in the tenth embodiment.
- Surface numbers 1 to 38 in Table 10 correspond to the optical surfaces m1 to m38 shown in FIG.
- variable magnification optical system ZL10 satisfies the conditional expressions (1) to (5).
- FIG. 29 is a diagram illustrating various aberrations (spherical aberration diagram, astigmatism diagram, distortion diagram, lateral chromatic aberration diagram, and lateral aberration diagram) when the variable magnification optical system ZL10 according to Example 10 is focused at infinity.
- (A) shows a wide-angle end state
- (b) shows an intermediate focal length state
- (c) shows a telephoto end state.
- 30A and 30B are lateral aberration diagrams when image blur correction is performed at the time of focusing on infinity of the variable magnification optical system ZL10 according to the tenth example.
- FIG. 30A is a wide-angle end state
- FIG. 30B is an intermediate focus.
- the distance state, (c) shows the telephoto end state.
- variable magnification optical system ZL10 has good optical performance with various aberrations corrected well from the wide-angle end state to the telephoto end state. . It can also be seen that high image forming performance is achieved even during image blur correction.
- variable magnification optical system ZL (ZL11) includes a first lens group G1 having negative refractive power arranged in order from the object side, and a first lens group G1 having positive refractive power.
- the second lens group G2 includes a third lens group G3 having a negative refractive power, a fourth lens group G4 having a positive refractive power, and a fifth lens group G5 having a positive refractive power.
- the first lens group G1 which is arranged in order from the object side, has a negative meniscus lens L11 having a concave surface facing the image side, a biconcave lens L12, a positive meniscus lens L13 having a convex surface facing the object side, and a concave surface facing the image side. And a cemented lens with the negative meniscus lens L14.
- the negative meniscus lens L11 has an aspheric image side surface.
- the second lens group G2 is composed of a twenty-first lens group G21 (focusing lens group) having positive refractive power and a twenty-second lens group G22 having positive refractive power, which are arranged in order from the object side.
- the twenty-first lens group G21 includes a positive meniscus lens L21 having a convex surface directed toward the object side, a positive meniscus lens L22 having a convex surface directed toward the object side, and a negative meniscus lens having a concave surface directed toward the image side. L23 and a biconvex lens L24.
- the 22nd lens group G22 is composed of a cemented lens composed of a negative meniscus lens L25 and a biconvex lens L26, which are arranged in order from the object side and have a concave surface directed toward the image side.
- the positive meniscus lens L22 has an aspheric object side surface.
- the third lens group G3 includes an aperture stop S arranged in order from the object side, a thirty-first lens group G31 (intermediate group) having a negative refractive power and a fixed position in the direction orthogonal to the optical axis, and a negative refractive power. And a thirty-second lens group G32 (anti-vibration lens group).
- the thirty-first lens group G31 includes a biconcave lens L31 arranged in order from the object side, and a positive meniscus lens L32 having a convex surface directed toward the object side.
- the thirty-second lens group G32 includes a biconcave lens L33 arranged in order from the object side, and a positive meniscus lens L34 having a convex surface directed toward the object side.
- the biconcave lens L33 has an aspheric object side surface.
- the fourth lens group G4 is composed of a biconvex lens L41, a positive meniscus lens L42 having a convex surface facing the image side, a negative meniscus lens L43 having a concave surface facing the image side, and a biconvex lens L44 arranged in order from the object side. It consists of a lens.
- the biconvex lens L44 has an aspheric image side surface.
- the fifth lens group G5 is composed of a cemented lens which is arranged in order from the object side and includes a positive meniscus lens L51 having a convex surface directed toward the object side and a negative meniscus lens L52 having a concave surface directed toward the image side.
- the first lens group G1 is once moved to the image side and then moved to the object side so that the distance between the lens groups changes, and the second lens group G2 is moved. This is done by moving to the object side, moving the third lens group G3 once to the image side, then moving to the object side, and moving the fourth lens group G4 to the object side.
- the fifth lens group G5 is fixed at the time of zooming.
- Focusing from infinity to a close object is performed by moving the 21st lens group G21 to the image side as a focusing lens group.
- image blur correction on the image plane I is performed by moving the thirty-second lens group G32 as a vibration-proof lens group VR so as to have a component orthogonal to the optical axis.
- the image stabilization coefficient ratio of the amount of image movement on the imaging surface to the amount of movement of the moving lens group in shake correction
- K rotational blurring at an angle ⁇ is used.
- the image stabilization coefficient in the wide-angle end state, is ⁇ 0.54 and the focal length is 24.77 mm. Therefore, the image stabilization lens group VR for correcting the rotational blur of 0.30 degrees is used.
- the amount of movement is -0.24 mm.
- the image stabilization coefficient In the intermediate focal length state, the image stabilization coefficient is ⁇ 0.61 and the focal length is 47.53 mm. Therefore, the movement amount of the image stabilization lens group VR for correcting the rotation blur of 0.30 degrees is ⁇ 0. .41 mm.
- the movement amount of the image stabilization lens group VR for correcting the rotation blur of 0.30 degrees is ⁇ 0. 51 mm.
- Table 11 shows the values of each item in the eleventh embodiment.
- Surface numbers 1 to 37 in Table 11 correspond to the optical surfaces m1 to m37 shown in FIG.
- variable magnification optical system ZL11 satisfies the conditional expressions (1) to (5).
- FIG. 32 is a diagram of various aberrations (spherical aberration diagram, astigmatism diagram, distortion diagram, lateral chromatic aberration diagram, and lateral aberration diagram) at the time of focusing on infinity of the variable magnification optical system ZL11 according to the eleventh example.
- (A) shows a wide-angle end state
- (b) shows an intermediate focal length state
- (c) shows a telephoto end state.
- FIG. 33 is a lateral aberration diagram when image blur correction is performed at the time of focusing on infinity of the variable magnification optical system ZL11 according to Example 11, where (a) is a wide-angle end state and (b) is an intermediate focus.
- the distance state, (c) shows the telephoto end state.
- variable magnification optical system ZL11 has excellent optical performance with various aberrations corrected well from the wide-angle end state to the telephoto end state. . It can also be seen that high image forming performance is achieved even during image blur correction.
- variable magnification optical system ZL (ZL12) includes a first lens group G1 having negative refractive power arranged in order from the object side, and a first lens group G1 having positive refractive power.
- the sixth lens group G6 includes a seventh lens group G7 having a positive refractive power.
- the first lens group G1 which is arranged in order from the object side, has a negative meniscus lens L11 having a concave surface facing the image side, a biconcave lens L12, a positive meniscus lens L13 having a convex surface facing the object side, and a concave surface facing the image side. And a cemented lens with the negative meniscus lens L14.
- the negative meniscus lens L11 has an aspheric image side surface.
- the second lens group G2 (focusing lens group) includes a positive meniscus lens L21 having a convex surface facing the object side, a positive meniscus lens L22 having a convex surface facing the object side, and a negative meniscus lens L23 having a concave surface facing the image side. And a biconvex lens L24.
- the positive meniscus lens L22 has an aspheric object side surface.
- the third lens group G3 is composed of a cemented lens composed of a negative meniscus lens L31 and a biconvex lens L32 arranged in order from the object side and having a concave surface directed toward the image side.
- the fourth lens group G4 (intermediate group) has a fixed position in the direction orthogonal to the optical axis, and is arranged in order from the object side, with an aperture stop S, a biconcave lens L41, and a positive meniscus with a convex surface facing the object side. Lens L42.
- the fifth lens group G5 (anti-vibration lens group) includes a biconcave lens L51 arranged in order from the object side, and a positive meniscus lens L52 having a convex surface directed toward the object side.
- the biconcave lens L51 has an aspheric object side surface.
- the sixth lens group G6 is composed of a biconvex lens L61, a positive meniscus lens L62 having a convex surface facing the image side, a negative meniscus lens L63 having a concave surface facing the image side, and a biconvex lens L64, which are arranged in order from the object side. It consists of a lens.
- the biconcave lens L64 has an aspheric image side surface.
- the seventh lens group G7 is composed of a cemented lens which is arranged in order from the object side and includes a positive meniscus lens L71 having a convex surface directed toward the object side and a negative meniscus lens L72 having a concave surface directed toward the image side.
- the first lens group G1 is once moved to the image side and then moved to the object side so that the distance between the lens groups changes, and the second lens group G2 is moved.
- Move to the object side move the third lens group G3 to the object side, move the fourth lens group G4 once to the image side, then move to the object side, and move the fifth lens group G5 once to the image side.
- the object is moved to the object side
- the sixth lens group G6 is moved to the object side
- the seventh lens group G7 is moved to the object side.
- Focusing from infinity to a close object is performed by moving the second lens group G2 to the image side as a focusing lens group.
- image blur correction on the image plane I is performed by moving the fifth lens group G5 as a vibration-proof lens group VR so as to have a component orthogonal to the optical axis.
- the image stabilization coefficient ratio of the amount of image movement on the imaging surface to the amount of movement of the moving lens group in shake correction
- K rotational blurring at an angle ⁇ is used.
- the image stabilization coefficient in the wide-angle end state, is ⁇ 0.54 and the focal length is 24.77 mm. Therefore, the image stabilization lens group VR for correcting the rotational blur of 0.30 degrees is used.
- the amount of movement is -0.24 mm.
- the image stabilization coefficient In the intermediate focal length state, the image stabilization coefficient is ⁇ 0.61 and the focal length is 47.33 mm. Therefore, the movement amount of the image stabilization lens group VR for correcting the rotation blur of 0.30 degrees is ⁇ 0. .41 mm.
- the image stabilization coefficient In the telephoto end state, the image stabilization coefficient is ⁇ 0.72 and the focal length is 67.34 mm. Therefore, the movement amount of the image stabilization lens group VR for correcting the rotation blur of 0.30 degrees is ⁇ 0. 50 mm.
- Table 12 below shows values of various specifications in the twelfth embodiment.
- Surface numbers 1 to 37 in Table 12 correspond to the respective optical surfaces m1 to m37 shown in FIG.
- variable magnification optical system ZL12 satisfies the conditional expressions (1) to (5).
- FIG. 35 is a diagram illustrating various aberrations (spherical aberration diagram, astigmatism diagram, distortion diagram, lateral chromatic aberration diagram, and lateral aberration diagram) of the zoom optical system ZL12 according to Example 12 at the time of focusing on infinity.
- (A) shows a wide-angle end state
- (b) shows an intermediate focal length state
- (c) shows a telephoto end state.
- FIG. 36 is a lateral aberration diagram when image blur correction is performed at the time of focusing on infinity of the variable magnification optical system ZL12 according to Example 12, where (a) is a wide-angle end state and (b) is an intermediate focus.
- the distance state, (c) shows the telephoto end state.
- variable magnification optical system ZL12 according to the twelfth example has good optical performance with various aberrations corrected well from the wide-angle end state to the telephoto end state. . It can also be seen that high image forming performance is achieved even during image blur correction.
- variable magnification optical system having a bright F value of about F2.8 to F3.5, a wide field angle of about 50 or more at a half field angle, and various aberrations being corrected well. Can be realized.
- variable magnification optical system ZL As numerical examples of the variable magnification optical system ZL, the four-group, five-group, and seven-group configurations have been shown. Is possible. Specifically, a configuration in which a lens or a lens group is added to the most object side, or a configuration in which a lens or a lens group is added to the most image side may be used. A configuration in which a lens group having a positive or negative refractive power is added between the first lens group and the second lens group may be used.
- the lens group whose position in the orthogonal direction is fixed may have a configuration in which an interval between the lens unit VR and the image stabilizing lens group VR may be changed during zooming.
- Examples 1 to 3, 5, 7 to 11 shows the fourth lens group G4, and in Examples 4, 6, and 12, the example of the sixth lens group G6 is shown, but this is not restrictive.
- the lens interval included in the image side lens unit RP is fixed at the time of zooming.
- the lens group refers to a portion having at least one lens separated by an air interval that changes at the time of zooming or focusing.
- the intermediate group is a lens group that is disposed on the image side of the second lens group and is disposed on the object side of the image stabilizing lens group and at a position facing the image stabilizing lens group.
- An aperture stop may be disposed on the object side of the intermediate group and at a position facing the intermediate group.
- the lenses constituting the intermediate group may be integrated in the position in the optical axis direction at the time of zooming, or may be divided into two or more lens groups to change the interval at the time of zooming. Further, at least a part of the lenses of the intermediate group may be moved (or fixed) in the optical axis direction integrally with the image stabilizing lens group at the time of zooming.
- variable magnification optical system ZL in order to focus from infinity to a short distance object, a part of the lens group, one entire lens group, or a plurality of lens groups is moved in the optical axis direction as a focusing lens group.
- a configuration may be adopted.
- such a focusing lens group can be applied to autofocus, and is also suitable for driving by an autofocus motor (for example, an ultrasonic motor).
- an autofocus motor for example, an ultrasonic motor.
- variable magnification optical system ZL either one of the entire lens group or the partial lens group is moved so as to have a component in a direction perpendicular to the optical axis, or rotated (oscillated) in an in-plane direction including the optical axis.
- the image stabilizing lens group VR may be configured to correct image blur caused by camera shake or the like.
- at least a part of the optical system disposed on the image side from the intermediate group Gn having a negative refractive power disposed on the image side from the aperture stop S is the anti-vibration lens group VR.
- the third lens group G3 is the anti-vibration lens group VR.
- the fifth lens group G5 is the anti-vibration lens group VR.
- a lens whose position in the direction orthogonal to the optical axis is fixed on the image side of the image stabilizing lens group VR may be moved or fixed integrally with the image stabilizing lens group VR at the time of zooming.
- the lens surface may be formed as a spherical surface, a flat surface, or an aspherical surface.
- the lens surface is a spherical surface or a flat surface, lens processing and assembly adjustment are facilitated, and deterioration of optical performance due to processing and assembly adjustment errors can be prevented. Further, even when the image plane is deviated, there is little deterioration in drawing performance.
- the lens surface is an aspheric surface
- the aspheric surface is an aspheric surface by grinding, a glass mold aspheric surface made of glass with an aspheric shape, or a composite aspheric surface made of resin with an aspheric shape on the glass surface. Any aspherical surface may be used.
- the lens surface may be a diffractive surface, and the lens may be a gradient index lens (GRIN lens) or a plastic lens.
- GRIN lens gradient index lens
- variable magnification optical system ZL it is preferable to form an aspherical surface on a lens of a medium having a refractive index nd of d-line smaller than 70. It is preferable that the lens of the medium having a refractive index nd smaller than 70 in the d-line be arranged in the lens group having the strongest positive refractive power among the lens groups arranged on the image side from the image stabilizing lens group VR. is there.
- the lens of the medium having a refractive index nd of less than 70 for the d-line is the most object side or the most object of the lens group having the strongest positive refracting power among the lens groups arranged on the image side from the image stabilizing lens group VR.
- the aspherical surface of the lens of the medium having a refractive index nd smaller than 70 at the d-line is the most object plane of the lens group having the strongest positive refractive power among the lens groups arranged on the image side from the image stabilizing lens group VR. More preferably, it is possible.
- the aperture stop S can be preferably disposed between the second lens group and the intermediate group Gn as described above, but without providing a member as an aperture stop.
- the role of the lens may be substituted.
- each lens surface may be provided with an antireflection film having a high transmittance in a wide wavelength region in order to reduce flare and ghost and achieve good optical performance with high contrast.
- the zoom optical system ZL has a zoom ratio of about 2.0 to 3.5 times.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
- Nonlinear Science (AREA)
- Adjustment Of Camera Lenses (AREA)
Abstract
Description
本願は、2015年1月30日に出願された日本国特許出願2015-017916号に基づき優先権を主張し、その内容をここに援用する。
1.000 < f(1~Gn)t/ft < 100.000
但し、
f(1~Gn)t:望遠端状態における前記第1レンズ群から前記中間群までの合成焦点距離、
ft:望遠端状態における全系の焦点距離。
1.000 < f(1~Gn)t/ft < 100.000
但し、
f(1~Gn)t:望遠端状態における前記第1レンズ群から前記第nレンズ群までの合成焦点距離、
ft:望遠端状態における全系の焦点距離。
1.000 < f(1~Gn)t/ft < 100.000
但し、
f(1~Gn)t:望遠端状態における前記第1レンズ群から前記中間群までの合成焦点距離、
ft:望遠端状態における全系の焦点距離。
1.000 < f(1~Gn)t/ft < 100.000
但し、
f(1~Gn)t:望遠端状態における前記第1レンズ群から前記第nレンズ群までの合成焦点距離、
ft:望遠端状態における全系の焦点距離。
1.000 < f(1~Gn)t/ft < 100.000 …(1)
但し、
f(1~Gn)t:望遠端状態における第1レンズ群G1から中間群Gnまでの合成焦点距離、
ft:望遠端状態における全系の焦点距離。
1.360 < -f(Gn~G(VR))w/fw < 5.000…(2)
但し、
f(Gn~G(VR))w:広角端状態における中間群Gnから防振レンズ群VRまでの合成焦点距離、
fw:広角端状態における全系の焦点距離。
0.400 < f(RP)/f(FP) < 2.000…(3)
但し、
f(RP):像側レンズ群RPの焦点距離、
f(FP):第1レンズ群G1より像面側に配置され、中間群Gnより物体側に配置されたレンズの広角端状態における合成焦点距離。
10.00° <ωt< 30.00° …(4)
但し、
ωt:望遠端状態における半画角。
30.00° <ωw< 50.00° …(5)
但し、
ωw:広角端状態における半画角。
1.000 < f(1~Gn)t/ft < 100.000 …(1)
但し、
f(1~Gn)t:望遠端状態における第1レンズ群G1から中間群Gnまでの合成焦点距離、
ft:望遠端状態における全系の焦点距離。
X(y)=(y2/R)/{1+(1-κ×y2/R2)1/2}+A4×y4+A6×y6+A8×y8+A10×y10+A12×y12 …(a)
第1実施例について、図1~図3及び表1を用いて説明する。第1実施例に係る変倍光学系ZL(ZL1)は、図1に示すように、物体側から順に並んだ、負の屈折力を有する第1レンズ群G1と、正の屈折力を有する第2レンズ群G2と、負の屈折力を有する第3レンズ群G3と、正の屈折力を有する第4レンズ群G4とからなる。
[レンズ諸元]
面番号 R D n(d) νd
1 121.85638 2.900 1.74389 49.5
*2 29.63670 15.360 1.00000
*3 -197.50816 0.200 1.56093 36.6
4 -169.39125 2.100 1.80400 46.6
5 60.51496 0.150 1.00000
6 52.85097 5.600 2.00100 29.1
7 146.47986 D7 1.00000
8 148.41161 3.000 1.59349 67.0
9 -517.10678 0.100 1.00000
10 49.87002 3.500 1.59349 67.0
11 157.35190 4.762 1.00000
12 87.49334 4.800 1.59349 67.0
13 -132.22400 1.500 1.90366 31.3
14 45.76622 1.640 1.00000
15 78.93526 4.450 1.77250 49.6
16 -176.75459 D16 1.00000
17 57.14809 5.300 1.81600 46.6
18 -583.40702 D18 1.00000
19 0.00000 1.200 1.00000
20 (開口絞り) D20 1.00000
21 -141.85186 1.200 1.80400 46.6
22 33.20059 4.360 1.00000
23 -33.72704 1.200 1.60300 65.4
24 -60.09530 0.100 1.00000
25 65.48868 3.150 1.84666 23.8
26 -127.25009 D26 1.00000
27 -119.24441 1.100 1.59349 67.0
28 67.70394 1.150 1.00000
29 62.36800 2.100 1.80518 25.5
30 107.42000 D30 1.00000
*31 119.87584 4.700 1.55332 71.7
32 -115.00129 0.100 1.00000
33 71.95116 1.400 1.83481 42.7
34 38.48800 6.800 1.59319 67.9
35 -237.01429 0.280 1.00000
36 43.00799 9.500 1.49782 82.6
37 -42.99900 1.400 1.80518 25.5
38 98.94100 4.600 1.69350 53.3
*39 462.40647 D39 1.00000
40 0.00000 D40 1.00000
[非球面データ]
第2面
κ = 0.00000e+00
A4 = 2.21510e-06
A6 = 2.57690e-09
A8 =-6.01500e-12
A10= 1.09200e-14
A12=-7.29000e-18
第3面
κ = 1.00000e+00
A4 =-3.83430e-07
A6 = 7.93340e-10
A8 =-3.53630e-12
A10= 5.08120e-15
A12=-3.43370e-18
第31面
κ = 1.00000e+00
A4 = 4.80890e-06
A6 = 5.06980e-10
A8 =-2.73140e-12
A10=-7.78150e-16
A12= 0.00000e+00
第39面
κ = 1.00000e+00
A4 = 7.56540e-06
A6 =-9.88600e-10
A8 = 5.61740e-12
A10=-8.07750e-15
A12= 0.00000e+00
[各種データ]
W M T
f 24.80 50.01 67.85
FNo 2.92 2.92 2.92
ω 42.5 22.7 17.2
Y 21.60 21.60 21.60
TL 220.251 198.419 200.827
BF 41.035 48.522 55.686
BF(空気換算) 41.035 48.522 55.686
[可変間隔データ]
無限遠
W M T
D0 ∞ ∞ ∞
倍率 - - -
f 24.80 50.01 67.85
D7 48.945 10.930 1.902
D16 7.735 7.735 7.735
D18 1.802 17.931 29.439
D20 2.088 4.668 3.620
D26 1.250 1.250 1.250
D30 17.692 7.680 1.492
D39 2.530 10.000 17.180
D40 38.505 38.522 38.506
[レンズ群データ]
レンズ群 始面 焦点距離
第1レンズ群 1 -38.47
第2レンズ群 8 42.49
第21レンズ群 8 78.58
第22レンズ群 17 64.02
第3レンズ群 21 -39.26
第31レンズ群 21 -65.76
第32レンズ群 27 -121.07
第4レンズ群 31 48.95
[フォーカシングデータ]
W M T
レンズ移動量 6.735 6.735 6.735
撮影距離(m) 0.4183 0.3810 0.3966
[条件式対応値]
条件式(1) f(1~Gn)t/ft = 10.118
条件式(2) -f(Gn~G(VR))w/fw = 1.583
条件式(3) f(RP)/fw = 1.152
条件式(4) ωt = 17.2
条件式(5) ωw = 42.5
第2実施例について、図4~図6及び表2を用いて説明する。第2実施例に係る変倍光学系ZL(ZL2)は、図4に示すように、物体側から順に並んだ、負の屈折力を有する第1レンズ群G1と、正の屈折力を有する第2レンズ群G2と、負の屈折力を有する第3レンズ群G3と、正の屈折力を有する第4レンズ群G4とからなる。
[レンズ諸元]
面番号 R D n(d) νd
1 123.86834 2.900 1.74389 49.5
*2 29.53373 15.066 1.00000
*3 -163.51331 0.300 1.56093 36.6
4 -139.86223 2.100 1.80400 46.6
5 65.45825 0.150 1.00000
6 56.53091 5.625 2.00100 29.1
7 182.99126 D7 1.00000
8 143.07855 3.200 1.59349 67.0
9 -394.38588 0.200 1.00000
10 55.12400 3.500 1.59349 67.0
11 197.46867 3.900 1.00000
12 77.75166 4.842 1.59349 67.0
13 -158.02225 1.500 1.90366 31.3
14 46.02834 1.844 1.00000
15 83.85157 3.848 1.77250 49.6
16 -277.24360 D16 1.00000
17 59.19194 5.400 1.80400 46.6
18 -354.91781 D18 1.00000
19 (開口絞り) D19 1.00000
20 -140.00000 1.178 1.77250 49.6
21 33.57372 4.337 1.00000
22 -36.69329 1.200 1.59349 67.0
23 -63.63544 0.100 1.00000
24 61.90037 3.102 1.84666 23.8
25 -187.23382 D25 1.00000
*26 -120.15188 1.100 1.61000 65.0
27 78.56667 0.966 1.00000
28 66.22584 1.921 1.80518 25.5
29 108.00000 D29 1.00000
*30 96.36461 5.000 1.55332 71.7
31 -132.37171 0.200 1.00000
32 103.35532 1.300 1.80518 25.5
33 49.66548 6.742 1.59319 67.9
34 -101.36549 0.188 1.00000
35 55.76221 9.450 1.49782 82.6
36 -36.89155 1.400 1.75000 31.4
37 97.48202 4.003 1.69350 53.2
*38 442.81061 D38 1.00000
39 0.00000 D39 1.00000
[非球面データ]
面 κ A4 A6 A8 A10
2 1.48700e-01 1.33488e-06 1.45328e-09 -6.97898e-13 5.22062e-16
3 4.31460e+00 -4.66997e-07 4.80176e-10 -1.05569e-12 3.62706e-16
26 -2.40000e+01 -1.76198e-06 1.30497e-09 0.00000e+00 0.00000e+00
30 3.97310e+00 3.04836e-06 -6.62447e-10 0.00000e+00 0.00000e+00
38 3.71000e+02 4.89412e-06 1.67774e-10 0.00000e+00 0.00000e+00
[各種データ]
W M T
f 24.80 47.76 67.85
FNo 2.92 2.92 2.92
ω 42.5 23.7 17.2
Y 21.60 21.60 21.60
TL 219.362 198.056 201.131
BF 41.459 48.894 57.632
BF(空気換算) 41.459 48.894 57.632
[可変間隔データ]
無限遠
W M T
D0 ∞ ∞ ∞
倍率 - - -
f 24.80 47.76 67.85
D7 48.978 12.578 1.835
D16 7.750 7.750 7.750
D18 3.000 18.144 31.911
D19 2.000 4.200 2.500
D25 1.440 1.440 1.440
D29 18.172 8.487 1.500
D38 1.139 8.574 17.251
D39 40.319 40.320 40.381
[レンズ群データ]
レンズ群 始面 焦点距離
第1レンズ群 1 -38.77
第2レンズ群 8 42.97
第21レンズ群 8 81.61
第22レンズ群 17 63.47
第3レンズ群 20 -40.68
第31レンズ群 20 -68.40
第32レンズ群 26 -123.54
第4レンズ群 30 49.36
[フォーカシングデータ]
W M T
レンズ移動量 6.75 6.75 6.75
撮影距離(m) 0.4124 0.3853 0.4059
[条件式対応値]
条件式(1) f(1~Gn)t/ft = 12.007
条件式(2) -f(Gn~G(VR))w/fw = 1.640
条件式(3) f(RP)/fw = 1.149
条件式(4) ωt = 17.2
条件式(5) ωw = 42.5
第3実施例について、図7~図9及び表3を用いて説明する。第3実施例に係る変倍光学系ZL(ZL3)は、図7に示すように、物体側から順に並んだ、負の屈折力を有する第1レンズ群G1と、正の屈折力を有する第2レンズ群G2と、負の屈折力を有する第3レンズ群G3と、正の屈折力を有する第4レンズ群G4と、正の屈折力を有する第5レンズ群G5とからなる。
[レンズ諸元]
面番号 R D n(d) νd
1 134.61434 2.900 1.74389 49.5
*2 30.98121 14.105 1.00000
*3 -271.55507 0.300 1.56093 36.6
4 -224.01871 2.100 1.80400 46.6
5 65.07720 0.200 1.00000
6 53.84066 5.401 2.00100 29.1
7 113.70514 D7 1.00000
8 259.91458 3.000 1.59349 67.0
9 -443.80327 0.243 1.00000
10 71.84029 3.500 1.69680 55.5
11 238.64880 4.057 1.00000
12 66.72188 5.288 1.59349 67.0
13 -145.97738 1.500 1.90366 31.3
14 49.38387 1.625 1.00000
15 83.91292 4.117 1.77250 49.6
16 -207.54373 D16 1.00000
17 59.58569 5.400 1.80400 46.6
18 -338.02309 D18 1.00000
19 (開口絞り) D19 1.00000
20 -140.00000 1.178 1.77250 49.6
21 34.70000 4.110 1.00000
22 -37.39824 1.200 1.59349 67.0
23 -64.12090 0.100 1.00000
24 62.46432 2.941 1.90200 25.3
25 -277.86426 D25 1.00000
*26 -157.84803 1.100 1.77250 49.6
27 61.66083 1.232 1.00000
28 63.26230 2.386 1.84666 23.8
29 198.11149 D29 1.00000
*30 74.15506 5.000 1.55332 71.7
31 -190.85228 0.100 1.00000
32 414.99863 1.300 1.84666 23.8
33 79.29491 6.640 1.59319 67.9
34 -59.47223 0.188 1.00000
35 77.14715 8.284 1.49700 81.6
36 -39.12349 1.400 1.70600 30.9
*37 467.32553 D37 1.00000
38 74.86867 2.769 1.49700 81.6
39 177.01793 1.400 1.79504 28.7
40 100.00000 D40 1.00000
[非球面データ]
面 κ A4 A6 A8 A10
2 -8.40000e-03 1.76676e-06 1.42633e-09 -6.16355e-13 3.36393e-16
3 5.89560e+00 -4.29758e-07 9.43230e-10 -1.79782e-12 8.72339e-16
26 -2.40000e+01 -5.18855e-07 4.69601e-10 0.00000e+00 0.00000e+00
30 7.93900e-01 2.20229e-06 -7.31449e-10 0.00000e+00 0.00000e+00
37 4.51000e+02 4.05983e-06 9.42292e-10 0.00000e+00 0.00000e+00
[各種データ]
W M T
f 24.82 47.49 67.84
FNo 2.91 2.91 2.92
ω 42.3 23.8 17.2
Y 21.60 21.60 21.60
TL 220.442 198.936 201.965
BF 42.289 42.290 42.353
BF(空気換算) 42.289 42.290 42.353
[可変間隔データ]
無限遠
W M T
D0 ∞ ∞ ∞
倍率 - - -
f 24.82 47.49 67.84
D7 49.018 12.832 1.835
D16 7.750 7.750 7.750
D18 3.000 17.679 31.753
D19 2.000 3.989 2.000
D25 1.412 1.412 1.412
D29 18.411 8.690 1.500
D37 1.500 9.233 18.301
D40 42.289 42.290 42.353
[レンズ群データ]
レンズ群 始面 焦点距離
第1レンズ群 1 -38.85
第2レンズ群 8 42.32
第21レンズ群 8 82.21
第22レンズ群 17 63.39
第3レンズ群 20 -41.39
第31レンズ群 20 -69.44
第32レンズ群 26 -122.74
第4レンズ群 30 52.58
第5レンズ群 38 2000.09
[フォーカシングデータ]
W M T
レンズ移動量 6.75 6.75 6.75
撮影距離(m) 0.4144 0.3857 0.4059
[条件式対応値]
条件式(1) f(1~Gn)t/ft = 8.425
条件式(2) -f(Gn~G(VR))w/fw = 1.668
条件式(3) f(RP)/fw = 1.242
条件式(4) ωt = 17.2
条件式(5) ωw = 42.3
第4実施例について、図10~図12及び表4を用いて説明する。第4実施例に係る変倍光学系ZL(ZL4)は、図10に示すように、物体側から順に並んだ、負の屈折力を有する第1レンズ群G1と、正の屈折力を有する第2レンズ群G2と、正の屈折力を有する第3レンズ群G3と、負の屈折力を有する第4レンズ群G4と、負の屈折力を有する第5レンズ群G5と、正の屈折力を有する第6レンズ群G6と、負の屈折力を有する第7レンズ群G7とからなる。
[レンズ諸元]
面番号 R D n(d) νd
1 134.61434 2.900 1.74389 49.5
*2 30.98121 14.105 1.00000
*3 -271.55507 0.300 1.56093 36.6
4 -224.01871 2.100 1.80400 46.6
5 65.07720 0.200 1.00000
6 53.84066 5.401 2.00100 29.1
7 113.70514 D7 1.00000
8 259.91458 3.000 1.59349 67.0
9 -443.80327 0.243 1.00000
10 71.84029 3.500 1.69680 55.5
11 238.64880 4.057 1.00000
12 66.72188 5.288 1.59349 67.0
13 -145.97738 1.500 1.90366 31.3
14 49.38387 1.625 1.00000
15 83.91292 4.117 1.77250 49.6
16 -207.54373 D16 1.00000
17 59.58569 5.400 1.80400 46.6
18 -338.02309 D18 1.00000
19 (開口絞り) D19 1.00000
20 -140.00000 1.178 1.77250 49.6
21 34.70000 4.110 1.00000
22 -37.39824 1.200 1.59349 67.0
23 -64.12090 0.100 1.00000
24 62.46432 2.941 1.90200 25.3
25 -277.86426 D25 1.00000
*26 -157.84803 1.100 1.77250 49.6
27 61.66083 1.232 1.00000
28 63.26230 2.386 1.84666 23.8
29 198.11149 D29 1.00000
*30 74.15506 5.000 1.55332 71.7
31 -190.85228 0.100 1.00000
32 414.99863 1.300 1.84666 23.8
33 79.29491 6.640 1.59319 67.9
34 -59.47223 0.188 1.00000
35 77.14715 8.284 1.49700 81.6
36 -39.50000 1.400 1.70600 30.9
*37 467.32553 D37 1.00000
38 74.86867 2.769 1.48749 70.3
39 300.00000 1.400 1.79504 28.7
40 100.00000 D40 1.00000
[非球面データ]
面 κ A4 A6 A8 A10
2 -8.40000e-03 1.76676e-06 1.42633e-09 -6.16355e-13 3.36393e-16
3 5.89560e+00 -4.29758e-07 9.43230e-10 -1.79782e-12 8.72339e-16
26 -2.40000e+01 -5.18855e-07 4.69601e-10 0.00000e+00 0.00000e+00
30 7.93900e-01 2.20229e-06 -7.31449e-10 0.00000e+00 0.00000e+00
37 4.51000e+02 4.05983e-06 9.42292e-10 0.00000e+00 0.00000e+00
[各種データ]
W M T
f 25.49 48.81 69.45
FNo 2.92 2.92 2.92
ω 41.6 23.3 16.8
Y 21.60 21.60 21.60
TL 222.079 204.772 203.978
BF 44.388 45.157 44.803
BF(空気換算) 44.388 45.157 44.803
[可変間隔データ]
無限遠
W M T
D0 ∞ ∞ ∞
倍率 - - -
f 25.49 48.81 69.45
D7 49.018 12.832 1.900
D16 7.750 12.000 8.300
D18 2.500 16.500 30.700
D19 2.000 3.989 2.000
D25 1.412 3.000 1.412
D29 18.450 7.000 1.500
D37 1.500 9.233 18.301
D40 44.388 45.157 44.803
[レンズ群データ]
レンズ群 始面 焦点距離
第1レンズ群 1 -38.85
第2レンズ群 8 82.21
第3レンズ群 17 63.39
第4レンズ群 20 -69.44
第5レンズ群 26 -122.74
第6レンズ群 30 52.47
第7レンズ群 38 -3528.86
[フォーカシングデータ]
W M T
レンズ移動量 6.75 11.00 7.30
撮影距離(m) 0.4160 0.3019 0.3889
[条件式対応値]
条件式(1) f(1~Gn)t/ft = 9.194
条件式(2) -f(Gn~G(VR))w/fw = 1.624
条件式(3) f(RP)/fw = 1.240
条件式(4) ωt = 16.8
条件式(5) ωw = 41.6
第5実施例について、図13~図15及び表5を用いて説明する。第5実施例に係る変倍光学系ZL(ZL5)は、図13に示すように、物体側から順に並んだ、負の屈折力を有する第1レンズ群G1と、正の屈折力を有する第2レンズ群G2と、負の屈折力を有する第3レンズ群G3と、正の屈折力を有する第4レンズ群G4と、正の屈折力を有する第5レンズ群G5とからなる。
[レンズ諸元]
面番号 R D n(d) νd
1 144.94817 2.900 1.74389 49.5
*2 29.83529 14.301 1.00000
*3 -322.90228 0.300 1.56093 36.6
4 -228.59270 2.100 1.80400 46.6
5 65.19707 0.200 1.00000
6 54.96083 5.379 2.00100 29.1
7 130.46571 D7 1.00000
8 127.91888 3.200 1.59349 67.0
9 -2245.90430 1.780 1.00000
10 81.17716 3.500 1.69680 55.5
11 679.72724 2.453 1.00000
12 61.05134 5.724 1.59349 67.0
13 -130.20006 1.500 1.90366 31.3
14 46.24112 1.694 1.00000
15 77.95470 3.722 1.77250 49.6
16 -564.05655 D16 1.00000
17 60.46759 5.400 1.80400 46.6
18 -263.45861 D18 1.00000
19 (開口絞り) 2.000 1.00000
20 -140.00000 1.178 1.77250 49.6
21 35.60000 4.059 1.00000
22 -35.16240 1.200 1.72916 54.6
23 -51.36153 0.100 1.00000
24 69.55169 2.879 1.90200 25.3
25 -209.71368 D25 1.00000
*26 -118.85935 1.100 1.77250 49.6
27 54.49135 1.415 1.00000
28 60.78441 2.635 1.90200 25.3
29 331.09581 D29 1.00000
*30 118.81221 4.686 1.55332 71.7
31 -102.83315 0.100 1.00000
32 152.27830 1.300 1.72000 28.0
33 85.35751 6.402 1.59319 67.9
34 -54.69093 0.188 1.00000
35 959.47501 7.222 1.49700 81.6
36 -30.23774 1.400 1.70600 29.0
*37 1029.85760 D37 1.00000
38 53.49812 4.770 1.55332 71.7
39 -6970.92580 1.400 1.90366 31.3
40 100.00000 D40 1.00000
[非球面データ]
面 κ A4 A6 A8 A10
2 -1.01100e-01 1.43852e-06 1.71179e-09 -1.42870e-12 1.05723e-15
3 2.81381e+01 -7.54473e-07 4.14335e-10 -5.77466e-13 3.16668e-16
26 -1.90000e+01 -9.14707e-07 9.49568e-10 0.00000e+00 0.00000e+00
30 -1.43460e+00 2.27762e-06 -5.51593e-10 0.00000e+00 0.00000e+00
37 2.44600e+03 4.05698e-06 0.00000e+00 0.00000e+00 0.00000e+00
[各種データ]
W M T
f 24.77 47.50 67.85
FNo 2.90 2.90 2.91
ω 42.4 23.8 17.2
Y 21.60 21.60 21.60
TL 218.725 198.522 200.695
BF 41.843 41.843 41.903
BF(空気換算) 41.843 41.843 41.903
[可変間隔データ]
無限遠
W M T
D0 ∞ ∞ ∞
倍率 - - -
f 24.77 47.50 67.85
D7 49.003 12.690 1.835
D16 7.750 7.750 7.750
D18 1.450 17.610 30.588
D25 1.473 1.473 1.473
D29 17.519 8.681 1.500
D37 1.500 10.288 17.459
D40 41.843 41.843 41.903
[レンズ群データ]
レンズ群 始面 焦点距離
第1レンズ群 1 -38.88
第2レンズ群 8 42.16
第21レンズ群 8 80.98
第22レンズ群 17 61.63
第3レンズ群 19 -42.05
第31レンズ群 19 -71.15
第32レンズ群 26 -121.45
第4レンズ群 30 56.98
第5レンズ群 38 619.99
[フォーカシングデータ]
W M T
レンズ移動量 6.75 6.75 6.75
撮影距離(m) 0.4148 0.3865 0.4059
[条件式対応値]
条件式(1) f(1~Gn)t/ft = 5.464
条件式(2) -f(Gn~G(VR))w/fw = 1.698
条件式(3) f(RP)/fw = 1.352
条件式(4) ωt = 17.2
条件式(5) ωw = 42.4
第6実施例について、図16~図18及び表6を用いて説明する。第6実施例に係る変倍光学系ZL(ZL6)は、図16に示すように、物体側から順に並んだ、負の屈折力を有する第1レンズ群G1と、正の屈折力を有する第2レンズ群G2と、正の屈折力を有する第3レンズ群G3と、負の屈折力を有する第4レンズ群G4と、負の屈折力を有する第5レンズ群G5と、正の屈折力を有する第6レンズ群G6と、正の屈折力を有する第7レンズ群G7とからなる。
[レンズ諸元]
面番号 R D n(d) νd
1 144.94817 2.900 1.74389 49.5
*2 29.83529 14.301 1.00000
*3 -322.90228 0.300 1.56093 36.6
4 -228.59270 2.100 1.80400 46.6
5 65.19707 0.200 1.00000
6 54.96083 5.379 2.00100 29.1
7 130.46571 D7 1.00000
8 127.91888 3.200 1.59349 67.0
9 -2245.90430 1.780 1.00000
10 81.17716 3.500 1.69680 55.5
11 679.72724 2.453 1.00000
12 61.05134 5.724 1.59349 67.0
13 -130.20006 1.500 1.90366 31.3
14 46.24112 1.694 1.00000
15 77.95470 3.722 1.77250 49.6
16 -564.05655 D16 1.00000
17 60.46759 5.400 1.80400 46.6
18 -263.45861 D18 1.00000
19 (開口絞り) 2.000 1.00000
20 -140.00000 1.178 1.77250 49.6
21 35.60000 4.059 1.00000
22 -35.16240 1.200 1.72916 54.6
23 -51.36153 0.100 1.00000
24 69.55169 2.879 1.90200 25.3
25 -209.71368 D25 1.00000
*26 -118.85935 1.100 1.77250 49.6
27 54.49135 1.415 1.00000
28 60.78441 2.635 1.90200 25.3
29 331.09581 D29 1.00000
*30 118.81221 4.686 1.55332 71.7
31 -102.83315 0.100 1.00000
32 152.27830 1.300 1.72000 28.0
33 85.35751 6.402 1.59319 67.9
34 -54.69093 0.188 1.00000
35 959.47501 7.222 1.49700 81.6
36 -30.23774 1.400 1.70600 29.0
*37 1029.85760 D37 1.00000
38 53.49812 4.770 1.55332 71.7
39 -6970.92580 1.400 1.90366 31.3
40 100.00000 D40 1.00000
[非球面データ]
面 κ A4 A6 A8 A10
2 -1.01100e-01 1.43852e-06 1.71179e-09 -1.42870e-12 1.05723e-15
3 2.81381e+01 -7.54473e-07 4.14335e-10 -5.77466e-13 3.16668e-16
26 -1.90000e+01 -9.14707e-07 9.49568e-10 0.00000e+00 0.00000e+00
30 -1.43460e+00 2.27762e-06 -5.51593e-10 0.00000e+00 0.00000e+00
37 2.44600e+03 4.05698e-06 0.00000e+00 0.00000e+00 0.00000e+00
[各種データ]
W M T
f 24.73 47.48 67.41
FNo 2.90 2.90 2.93
ω 42.5 23.9 17.3
Y 21.60 21.60 21.60
TL 218.388 200.467 201.434
BF 41.880 42.603 42.530
BF(空気換算) 41.880 42.603 42.530
[可変間隔データ]
無限遠
W M T
D0 ∞ ∞ ∞
倍率 - - -
f 24.73 47.48 67.41
D7 49.003 12.690 1.835
D16 7.750 9.500 8.500
D18 1.450 17.000 30.000
D25 1.100 2.500 1.473
D29 17.519 7.700 1.450
D37 1.500 10.288 17.459
D40 41.880 42.603 42.530
[レンズ群データ]
レンズ群 始面 焦点距離
第1レンズ群 1 -38.88
第2レンズ群 8 80.98
第3レンズ群 17 61.63
第4レンズ群 19 -71.15
第5レンズ群 26 -121.45
第6レンズ群 30 56.98
第7レンズ群 38 619.99
[フォーカシングデータ]
W M T
レンズ移動量 6.75 8.50 7.50
撮影距離(m) 0.4145 0.3406 0.3816
[条件式対応値]
条件式(1) f(1~Gn)t/ft = 5.692
条件式(2) -f(Gn~G(VR))w/fw = 1.704
条件式(3) f(RP)/fw = 1.352
条件式(4) ωt = 17.3
条件式(5) ωw = 42.5
第7実施例について、図19~図21及び表7を用いて説明する。第7実施例に係る変倍光学系ZL(ZL7)は、図19に示すように、物体側から順に並んだ、負の屈折力を有する第1レンズ群G1と、正の屈折力を有する第2レンズ群G2と、負の屈折力を有する第3レンズ群G3と、正の屈折力を有する第4レンズ群G4と、正の屈折力を有する第5レンズ群G5とからなる。
[レンズ諸元]
面番号 R D n(d) νd
1 155.89691 2.900 1.74389 49.5
*2 29.88191 12.307 1.00000
*3 -998.95016 0.380 1.56093 36.6
4 -380.00000 2.100 1.75500 52.3
5 54.41504 0.200 1.00000
6 48.25639 5.777 1.90200 25.3
7 111.71017 D7 1.00000
8 75.52522 4.500 1.75000 53.0
9 599.23665 3.427 1.00000
10 65.44832 4.500 1.75500 52.3
11 -536.13486 0.864 1.00000
12 -161.64034 1.550 1.90200 25.3
13 48.60000 1.455 1.00000
14 77.92408 4.650 1.77250 49.6
15 -199.82321 D15 1.00000
16 59.54554 5.676 1.81600 46.6
17 -305.53264 D17 1.00000
18 (開口絞り) 2.000 1.00000
19 -140.00000 1.200 1.77250 49.6
20 34.07853 4.022 1.00000
21 -34.00000 1.200 1.72916 54.6
22 -47.36695 0.100 1.00000
23 60.05931 3.182 1.84666 23.8
24 -160.47286 D24 1.00000
*25 -266.90180 1.100 1.77250 49.6
26 80.68524 0.780 1.00000
27 68.16544 1.736 1.84666 23.8
28 100.00000 D28 1.00000
*29 300.52804 4.082 1.55332 71.7
30 -61.39111 0.100 1.00000
31 178.14990 4.513 1.60300 65.4
32 -65.35343 0.200 1.00000
33 142.59265 7.934 1.65160 58.6
34 -28.88978 1.400 1.90200 29.1
35 300.00000 D35 1.00000
36 137.03160 1.400 1.83000 37.0
37 64.66324 3.650 1.59319 67.9
38 735.00000 D38 1.00000
[非球面データ]
面 κ A4 A6 A8 A10
2 -9.54700e-01 5.69885e-06 -1.82979e-09 8.49633e-13 0.00000e+00
3 -1.40000e+01 -6.77491e-07 -2.49807e-10 0.00000e+00 0.00000e+00
25 -1.90000e+01 3.06942e-07 -6.70956e-10 0.00000e+00 0.00000e+00
29 5.86950e+00 -6.89526e-07 2.25877e-09 0.00000e+00 0.00000e+00
[各種データ]
W M T
f 24.77 47.50 67.86
FNo 2.90 2.90 2.90
ω 42.4 23.9 17.2
Y 21.60 21.60 21.60
TL 210.992 190.994 193.977
BF 39.982 39.983 40.044
BF(空気換算) 39.982 39.983 40.044
[可変間隔データ]
無限遠
W M T
D0 ∞ ∞ ∞
倍率 - - -
f 24.77 47.50 67.86
D7 49.068 12.647 1.800
D15 7.785 7.785 7.785
D17 3.346 19.816 33.635
D24 0.999 0.999 0.999
D28 19.428 10.413 3.291
D35 1.500 10.465 17.538
D38 39.982 39.983 40.044
[レンズ群データ]
レンズ群 始面 焦点距離
第1レンズ群 1 -38.96
第2レンズ群 8 42.92
第21レンズ群 8 85.00
第22レンズ群 16 61.50
第3レンズ群 18 -45.09
第31レンズ群 18 -84.08
第32レンズ群 25 -117.85
第4レンズ群 29 56.15
第5レンズ群 36 620.00
[フォーカシングデータ]
W M T
レンズ移動量 6.785 6.785 6.785
撮影距離(m) 0.3997 0.3832 0.4060
[条件式対応値]
条件式(1) f(1~Gn)t/ft = 3.792
条件式(2) -f(Gn~G(VR))w/fw = 1.820
条件式(3) f(RP)/fw = 1.308
条件式(4) ωt = 17.2
条件式(5) ωw = 42.4
第8実施例について、図22~図24及び表8を用いて説明する。第8実施例に係る変倍光学系ZL(ZL8)は、図22に示すように、物体側から順に並んだ、負の屈折力を有する第1レンズ群G1と、正の屈折力を有する第2レンズ群G2と、負の屈折力を有する第3レンズ群G3と、正の屈折力を有する第4レンズ群G4と、正の屈折力を有する第5レンズ群G5とからなる。
[レンズ諸元]
面番号 R D n(d) νd
1 171.22378 2.900 1.74389 49.5
*2 29.77139 12.208 1.00000
*3 -2272.73400 0.380 1.56093 36.6
4 -400.00000 2.100 1.75500 52.3
5 59.96509 0.200 1.00000
6 50.35816 7.000 1.90200 25.3
7 111.56759 D7 1.00000
8 0.00000 0.200 1.00000
9 82.35931 3.100 1.75000 51.0
10 869.55661 3.243 1.00000
11 65.70660 4.150 1.77250 49.6
12 -400.15117 0.889 1.00000
13 -142.76803 1.550 1.90200 25.3
14 49.72103 1.379 1.00000
15 78.21406 4.000 1.77250 49.6
16 -195.63433 D16 1.00000
17 58.26284 5.676 1.81600 46.6
18 -346.07444 D18 1.00000
19 (開口絞り) 2.000 1.00000
20 -140.00000 1.200 1.77250 49.6
21 36.40792 4.110 1.00000
22 -39.80791 1.200 1.72916 54.7
23 -59.45079 0.100 1.00000
24 69.32659 3.085 1.84666 23.8
25 -134.48153 D25 1.00000
*26 -251.99331 1.100 1.77250 49.6
27 63.18500 0.868 1.00000
28 59.71324 2.131 1.86000 24.2
29 100.00000 D29 1.00000
*30 -900.00000 3.663 1.55332 71.7
31 -54.18440 0.100 1.00000
32 84.94639 5.806 1.60300 65.5
33 -60.43832 0.200 1.00000
34 278.20778 6.810 1.65160 58.5
35 -32.56689 1.400 1.90200 28.5
36 191.68646 D36 1.00000
37 132.64391 1.400 1.83000 34.0
38 61.28313 3.734 1.59319 67.9
39 735.00000 D39 1.00000
[非球面データ]
面 κ A4 A6 A8 A10
2 -3.84000e-01 2.66465e-06 -1.34312e-10 -5.72743e-14 0.00000e+00
3 3.50000e+00 -9.48227e-07 -3.38888e-10 0.00000e+00 0.00000e+00
26 -2.80000e+01 3.11252e-07 -7.78416e-10 0.00000e+00 0.00000e+00
30 -6.00000e+00 -1.99894e-06 1.27933e-09 0.00000e+00 0.00000e+00
[各種データ]
W M T
f 24.77 47.50 67.85
FNo 2.90 2.90 2.90
ω 42.4 24.0 17.2
Y 21.60 21.60 21.60
TL 209.253 187.862 189.544
BF 40.016 40.020 40.085
BF(空気換算) 40.016 40.020 40.085
[可変間隔データ]
無限遠
W M T
D0 ∞ ∞ ∞
倍率 - - -
f 24.77 47.50 67.85
D7 49.018 12.518 1.800
D16 7.835 7.835 7.835
D18 3.200 18.355 30.700
D25 0.930 0.930 0.930
D29 18.873 9.373 1.900
D36 1.500 10.950 18.413
D39 40.016 40.020 40.085
[レンズ群データ]
レンズ群 始面 焦点距離
第1レンズ群 1 -39.60
第2レンズ群 8 41.35
第21レンズ群 8 84.99
第22レンズ群 17 61.50
第3レンズ群 19 -43.44
第31レンズ群 19 -85.70
第32レンズ群 26 -106.03
第4レンズ群 30 54.89
第5レンズ群 37 619.95
[フォーカシングデータ]
W M T
レンズ移動量 6.835 6.835 6.835
撮影距離(m) 0.4055 0.3839 0.4040
[条件式対応値]
条件式(1) f(1~Gn)t/ft = 3.390
条件式(2) -f(Gn~G(VR))w/fw = 1.754
条件式(3) f(RP)/fw = 1.327
条件式(4) ωt = 17.2
条件式(5) ωw = 42.4
第9実施例について、図25~図27及び表9を用いて説明する。第9実施例に係る変倍光学系ZL(ZL9)は、図25に示すように、物体側から順に並んだ、負の屈折力を有する第1レンズ群G1と、正の屈折力を有する第2レンズ群G2と、負の屈折力を有する第3レンズ群G3と、正の屈折力を有する第4レンズ群G4と、正の屈折力を有する第5レンズ群G5とからなる。
[レンズ諸元]
面番号 R D n(d) νd
1 180.28031 2.900 1.74389 49.5
*2 30.43353 15.281 1.00000
3 -400.00000 2.100 1.80400 46.6
4 61.64102 0.200 1.00000
5 52.74108 5.413 2.00100 29.1
6 127.21255 D6 1.00000
7 250.61095 3.650 1.48749 70.3
8 -249.39202 0.258 1.00000
9 60.71776 3.347 1.69680 55.5
10 223.73133 2.543 1.00000
11 88.72642 4.052 1.59349 67.0
12 -200.28776 1.450 1.90366 31.3
13 46.94856 1.456 1.00000
14 71.21863 4.324 1.77250 49.6
15 -259.88006 D15 1.00000
16 64.61643 5.373 1.80400 46.6
17 -171.33576 1.500 1.85026 32.4
18 -427.99181 D18 1.00000
19 (開口絞り) D19 1.00000
20 -140.00000 1.200 1.77250 49.6
21 98.73269 2.349 1.00000
22 -46.53449 1.200 1.76000 50.0
23 -88.62573 0.100 1.00000
24 -227.14142 2.169 1.90200 25.3
25 -65.70168 D25 1.00000
*26 -82.31022 1.100 1.77250 49.6
*27 41.14809 1.433 1.00000
28 50.51593 3.020 1.90200 25.3
29 -7587.28970 D29 1.00000
*30 445.83969 3.966 1.55332 71.7
31 -73.29859 0.100 1.00000
32 153.51046 3.949 1.60300 65.4
33 -101.27922 0.200 1.00000
34 86.09865 7.212 1.59319 67.9
35 -40.79305 1.200 1.79000 26.0
*36 180.00000 D36 1.00000
37 69.32616 4.432 1.61800 63.3
38 -225.96343 1.200 1.90366 31.3
39 140.29946 D39 1.00000
[非球面データ]
面 κ A4 A6 A8 A10
2 -1.14500e-01 2.30934e-06 4.18972e-10 6.24631e-13 0.00000e+00
26 -4.22870e+00 4.95698e-23 1.31315e-09 0.00000e+00 0.00000e+00
27 5.80700e-01 3.38518e-07 0.00000e+00 0.00000e+00 0.00000e+00
30 1.94200e-01 3.81661e-06 -2.35375e-09 0.00000e+00 0.00000e+00
36 1.00000e+00 4.12000e-06 0.00000e+00 0.00000e+00 0.00000e+00
[各種データ]
W M T
f 24.77 47.50 67.85
FNo 2.90 2.90 2.92
ω 42.3 23.9 17.2
Y 21.60 21.60 21.60
TL 214.110 194.068 198.548
BF 40.318 40.318 40.378
BF(空気換算) 40.318 40.318 40.378
[可変間隔データ]
無限遠
W M T
D0 ∞ ∞ ∞
倍率 - - -
f 24.77 47.50 67.85
D6 49.013 12.596 1.845
D15 7.840 7.840 7.840
D18 3.000 19.375 34.606
D19 2.000 3.243 2.000
D25 0.930 0.930 0.930
D29 20.833 9.633 1.900
D36 1.500 11.458 20.373
D39 40.318 40.318 40.378
[レンズ群データ]
レンズ群 始面 焦点距離
第1レンズ群 1 -39.13
第2レンズ群 7 43.78
第21レンズ群 7 80.97
第22レンズ群 16 71.04
第3レンズ群 20 -48.53
第31レンズ群 20 -95.21
第32レンズ群 26 -105.72
第4レンズ群 30 57.82
第5レンズ群 37 700.00
[フォーカシングデータ]
W M T
レンズ移動量 6.840 6.840 6.840
撮影距離(m) 0.4165 0.3788 0.3972
[条件式対応値]
条件式(1) f(1~Gn)t/ft = 3.127
条件式(2) -f(Gn~G(VR))w/fw = 1.959
条件式(3) f(RP)/fw = 1.321
条件式(4) ωt = 17.2
条件式(5) ωw = 42.3
第10実施例について、図28~図30及び表10を用いて説明する。第10実施例に係る変倍光学系ZL(ZL10)は、図28に示すように、物体側から順に並んだ、負の屈折力を有する第1レンズ群G1と、正の屈折力を有する第2レンズ群G2と、負の屈折力を有する第3レンズ群G3と、正の屈折力を有する第4レンズ群G4と、正の屈折力を有する第5レンズ群G5とからなる。
[レンズ諸元]
面番号 R D n(d) νd
1 179.73529 2.880 1.74389 49.5
*2 28.00000 13.314 1.00000
3 -709.59863 2.295 1.80518 25.4
4 -228.05154 2.100 1.76500 49.5
5 90.21469 0.200 1.00000
6 56.00020 4.396 2.00100 29.1
7 96.29881 D7 1.00000
8 96.54068 2.840 1.60300 65.4
9 715.47283 0.200 1.00000
*10 57.08059 3.395 1.69680 55.5
11 181.18928 5.604 1.00000
12 98.04986 3.261 1.59319 67.9
13 -796.91447 1.450 1.76182 26.6
14 41.75300 1.983 1.00000
15 73.03256 3.630 1.74100 52.8
16 -3863.66610 D16 1.00000
17 58.79270 5.010 1.80400 46.6
18 -393.67543 D18 1.00000
19 (開口絞り) 1.540 1.00000
20 -142.34068 1.200 1.81600 46.6
21 35.05467 1.301 1.00000
22 38.87328 2.715 1.90200 25.3
23 117.88926 D23 1.00000
*24 -118.17706 1.200 1.73231 53.2
25 44.69744 1.030 1.00000
26 52.10387 2.485 1.90200 25.3
27 195.76461 D27 1.00000
*28 71.27465 4.998 1.49782 82.6
29 -102.88416 0.100 1.00000
30 91.68269 1.200 1.90366 31.3
31 52.62629 6.605 1.60300 65.4
32 -69.88439 0.200 1.00000
33 3314.77510 4.235 1.59319 67.9
34 -54.08421 1.200 1.78500 26.2
*35 216.08233 D35 1.00000
36 56.19817 3.548 1.61800 63.3
37 210.95097 1.200 1.83400 37.2
38 84.00000 D38 1.00000
[非球面データ]
面 κ A4 A6 A8 A10
2 -6.73000e-02 2.59588e-06 7.45638e-10 -2.10470e-14 3.51745e-16
10 1.00000e+00 -4.00000e-07 0.00000e+00 0.00000e+00 0.00000e+00
24 -4.10880e+00 5.35515e-07 2.05353e-09 0.00000e+00 0.00000e+00
28 -1.10460e+00 3.84373e-06 -4.29919e-09 3.81283e-12 0.00000e+00
35 1.00000e+00 5.16409e-06 2.00000e-09 0.00000e+00 0.00000e+00
[各種データ]
W M T
f 24.77 47.50 67.84
FNo 2.90 2.90 2.90
ω 42.2 23.9 17.2
Y 21.60 21.60 21.60
TL 208.124 187.432 190.017
BF 40.315 40.322 40.381
BF(空気換算) 40.315 40.322 40.381
[可変間隔データ]
無限遠
W M T
D0 ∞ ∞ ∞
倍率 - - -
f 24.77 47.50 67.84
D7 48.968 12.510 1.800
D16 7.185 7.185 7.185
D18 1.300 17.853 29.355
D23 2.232 2.232 2.232
D27 19.311 9.731 1.900
D35 1.500 10.287 19.851
D38 40.315 40.322 40.381
[レンズ群データ]
レンズ群 始面 焦点距離
第1レンズ群 1 -39.97
第2レンズ群 8 43.09
第21レンズ群 8 80.97
第22レンズ群 17 63.94
第3レンズ群 19 -42.99
第31レンズ群 19 -77.20
第32レンズ群 24 -103.89
第4レンズ群 28 56.10
第5レンズ群 36 419.32
[フォーカシングデータ]
W M T
レンズ移動量 6.185 6.185 6.185
撮影距離(m) 0.4444 0.4101 0.4308
[条件式対応値]
条件式(1) f(1~Gn)t/ft = 3.727
条件式(2) -f(Gn~G(VR))w/fw = 1.736
条件式(3) f(RP)/fw = 1.302
条件式(4) ωt = 17.2
条件式(5) ωw = 42.2
第11実施例について、図31~図33及び表11を用いて説明する。第11実施例に係る変倍光学系ZL(ZL11)は、図31に示すように、物体側から順に並んだ、負の屈折力を有する第1レンズ群G1と、正の屈折力を有する第2レンズ群G2と、負の屈折力を有する第3レンズ群G3と、正の屈折力を有する第4レンズ群G4と、正の屈折力を有する第5レンズ群G5とからなる。
[レンズ諸元]
面番号 R D n(d) νd
1 169.82392 2.880 1.74389 49.5
*2 28.00000 13.823 1.00000
3 -277.92141 2.100 1.69680 55.5
4 89.48130 0.972 1.00000
5 57.53130 5.977 1.90366 31.3
6 288.24720 2.000 1.60311 60.7
7 89.16103 D7 1.00000
8 97.98839 2.906 1.62041 60.3
9 988.16122 0.870 1.00000
*10 52.75776 3.799 1.69680 55.5
11 185.81817 3.941 1.00000
12 244.48174 1.450 1.74077 27.7
13 42.81836 2.225 1.00000
14 81.99098 3.910 1.74100 52.8
15 -359.52152 D15 1.00000
16 56.22525 1.450 1.85000 25.5
17 41.20061 6.609 1.75500 52.3
18 -333.94984 D18 1.00000
19 (開口絞り) 1.488 1.00000
20 -133.09742 1.200 1.81600 46.6
21 40.80390 0.998 1.00000
22 48.84393 2.545 1.90200 25.3
23 197.19167 D23 1.00000
*24 -159.18908 1.200 1.70000 55.0
25 46.35402 0.845 1.00000
26 47.53111 2.169 1.90200 25.3
27 92.34748 D27 1.00000
28 59.48521 4.431 1.59319 67.9
29 -192.71174 0.100 1.00000
30 -6013.33410 3.364 1.59319 67.9
31 -71.43167 0.200 1.00000
32 5300.14030 1.404 1.90366 31.3
33 31.44019 7.197 1.59319 67.9
*34 -117.32485 D34 1.00000
35 57.67894 3.814 1.70000 56.0
36 263.45851 0.763 1.77250 49.6
37 84.00000 D37 1.00000
[非球面データ]
面 κ A4 A6 A8 A10
2 -5.97000e-02 2.62042e-06 7.82559e-10 9.78767e-14 4.33213e-16
10 5.28200e-01 6.32647e-08 1.88164e-10 0.00000e+00 0.00000e+00
24 -6.74850e+00 4.82591e-07 2.86667e-10 0.00000e+00 0.00000e+00
34 -1.67545e+01 1.36811e-06 3.39381e-09 0.00000e+00 0.00000e+00
[各種データ]
W M T
f 24.77 47.53 67.85
FNo 2.90 2.90 2.91
ω 42.2 23.9 17.3
Y 21.60 21.60 21.60
TL 210.949 190.232 192.480
BF 43.417 43.503 43.670
BF(空気換算) 43.417 43.503 43.670
[可変間隔データ]
無限遠
W M T
D0 ∞ ∞ ∞
倍率 - - -
f 24.77 47.53 67.85
D7 48.868 12.444 1.800
D15 7.185 7.185 7.185
D18 0.800 16.872 28.207
D23 1.827 1.827 1.827
D27 20.646 10.368 1.900
D34 1.574 11.401 21.260
D37 43.417 43.503 43.670
[レンズ群データ]
レンズ群 始面 焦点距離
第1レンズ群 1 -39.52
第2レンズ群 8 42.67
第21レンズ群 8 81.00
第22レンズ群 16 66.83
第3レンズ群 19 -43.84
第31レンズ群 19 -83.74
第32レンズ群 24 -98.45
第4レンズ群 28 61.94
第5レンズ群 35 285.15
[フォーカシングデータ]
W M T
レンズ移動量 6.185 6.185 6.185
撮影距離(m) 0.4485 0.4038 0.4202
[条件式対応値]
条件式(1) f(1~Gn)t/ft = 2.719
条件式(2) -f(Gn~G(VR))w/fw = 1.771
条件式(3) f(RP)/fw = 1.452
条件式(4) ωt = 17.3
条件式(5) ωw = 42.2
第12実施例について、図34~図36及び表12を用いて説明する。第12実施例に係る変倍光学系ZL(ZL12)は、図34に示すように、物体側から順に並んだ、負の屈折力を有する第1レンズ群G1と、正の屈折力を有する第2レンズ群G2と、正の屈折力を有する第3レンズ群G3と、負の屈折力を有する第4レンズ群G4と、負の屈折力を有する第5レンズ群G5と、正の屈折力を有する第6レンズ群G6と、正の屈折力を有する第7レンズ群G7とからなる。
[レンズ諸元]
面番号 R D n(d) νd
1 169.82392 2.880 1.74389 49.5
*2 28.00000 13.823 1.00000
3 -277.92141 2.100 1.69680 55.5
4 89.48130 0.972 1.00000
5 57.53130 5.977 1.90366 31.3
6 288.24720 2.000 1.60311 60.7
7 89.16103 D7 1.00000
8 97.98839 2.906 1.62041 60.3
9 988.16122 0.870 1.00000
*10 52.75776 3.799 1.69680 55.5
11 185.81817 3.941 1.00000
12 244.48174 1.450 1.74077 27.7
13 42.81836 2.225 1.00000
14 81.99098 3.910 1.74100 52.8
15 -359.52152 D15 1.00000
16 56.22525 1.450 1.85000 25.5
17 41.20061 6.609 1.75500 52.3
18 -333.94984 D18 1.00000
19 (開口絞り) 1.488 1.00000
20 -133.09742 1.200 1.81600 46.6
21 40.80390 0.998 1.00000
22 48.84393 2.545 1.90200 25.3
23 197.19167 D23 1.00000
*24 -159.18908 1.200 1.70000 55.0
25 46.35402 0.845 1.00000
26 47.53111 2.169 1.90200 25.3
27 92.34748 D27 1.00000
28 59.48521 4.431 1.59319 67.9
29 -192.71174 0.100 1.00000
30 -6013.33410 3.364 1.59319 67.9
31 -71.43167 0.200 1.00000
32 5300.14030 1.404 1.90366 31.3
33 31.44019 7.197 1.59319 67.9
*34 -117.32485 D34 1.00000
35 57.67894 3.814 1.70000 56.0
36 263.45851 0.763 1.77250 49.6
37 84.00000 D37 1.00000
[非球面データ]
面 κ A4 A6 A8 A10
2 -5.97000e-02 2.62042e-06 7.82559e-10 9.78767e-14 4.33213e-16
10 5.28200e-01 6.32647e-08 1.88164e-10 0.00000e+00 0.00000e+00
24 -6.74850e+00 4.82591e-07 2.86667e-10 0.00000e+00 0.00000e+00
34 -1.67545e+01 1.36811e-06 3.39381e-09 0.00000e+00 0.00000e+00
[各種データ]
W M T
f 24.77 47.33 67.34
FNo 2.90 2.90 2.91
ω 42.2 24.0 17.4
Y 21.60 21.60 21.60
TL 210.949 193.610 195.380
BF 43.417 43.433 45.688
BF(空気換算) 43.417 43.433 45.688
[可変間隔データ]
無限遠
W M T
D0 ∞ ∞ ∞
倍率 - - -
f 24.77 47.33 67.34
D7 48.868 12.444 1.600
D15 7.185 12.000 9.500
D18 0.800 16.872 26.900
D23 1.827 1.827 2.000
D27 20.646 9.000 1.800
D34 1.574 11.401 21.260
D37 43.417 43.433 45.688
[レンズ群データ]
レンズ群 始面 焦点距離
第1レンズ群 1 -39.52
第2レンズ群 8 81.00
第3レンズ群 16 66.83
第4レンズ群 19 -83.74
第5レンズ群 24 -98.45
第6レンズ群 28 61.94
第7レンズ群 35 285.15
[フォーカシングデータ]
W M T
レンズ移動量 6.185 11.000 8.500
撮影距離(m) 0.4485 0.2946 0.3494
[条件式対応値]
条件式(1) f(1~Gn)t/ft = 2.898
条件式(2) -f(Gn~G(VR))w/fw = 1.770
条件式(3) f(RP)/fw = 1.452
条件式(4) ωt = 17.4
条件式(5) ωw = 42.2
また、中間群は、第2レンズ群より像側に配置され、防振レンズ群の物体側であって防振レンズ群に対向する位置に配置されるレンズ群である。中間群の物体側であって中間群に対向する位置に開口絞りを配置することとしてもよい。
また、中間群を構成するレンズは、変倍時に光軸方向の位置を一体としてもよく、2以上のレンズ群に分けてその間隔を変倍時に変化させることとしてもよい。
また、中間群の少なくとも一部のレンズを、変倍時に防振レンズ群と一体的に光軸方向に移動(または固定)させることとしてもよい。
G1 第1レンズ群
G2 第2レンズ群
G3 第3レンズ群
G4 第4レンズ群
VR 防振レンズ群
S 開口絞り
I 像面
1 カメラ(光学機器)。
Claims (9)
- 負の屈折力を有する第1レンズ群と、正の屈折力を有する第2レンズ群とを有し、
前記第2レンズ群より像側に配置された中間群を有し、
前記中間群より像側に配置され、光軸と直交方向の成分を持つように移動可能に構成された防振レンズ群を有し、
少なくとも、前記第1レンズ群と前記第2レンズ群との間隔と、前記第2レンズ群と前記中間群との間隔とを変化させることにより変倍を行い、
以下の条件式を満足することを特徴とする変倍光学系。
1.000 < f(1~Gn)t/ft < 100.000
但し、
f(1~Gn)t:望遠端状態における前記第1レンズ群から前記中間群までの合成焦点距離、
ft:望遠端状態における全系の焦点距離。 - 以下の条件式を満足することを特徴とする請求項1に記載の変倍光学系。
1.360 < -f(Gn~G(VR))w/fw < 5.000
但し、
f(Gn~G(VR))w:広角端状態における前記中間群から前記防振レンズ群までの合成焦点距離、
fw:広角端状態における全系の焦点距離。 - 前記防振レンズ群より像側に配置された正の屈折力を有するレンズ群のうち、正の屈折力が最も強い像側レンズ群を有し、
前記像側レンズ群と前記防振レンズ群との間隔は変倍の際に変化し、
以下の条件式を満足することを特徴とする請求項1又は2に記載の変倍光学系。
0.400 < f(RP)/f(FP) < 2.000
但し、
f(RP):前記像側レンズ群の焦点距離、
f(FP):前記第1レンズ群より像面側に配置され、前記中間群より物体側に配置されたレンズの広角端状態における合成焦点距離。 - 前記中間群は、光軸と直交方向の位置を固定されており、負の屈折力を有することを特徴とする請求項1~3のいずれか一項に記載の変倍光学系。
- 前記中間群は、正レンズ成分と、負レンズ成分を、それぞれ1つ以上有することを特徴とする請求項1~4のいずれか一項に記載の変倍光学系。
- 前記第2レンズ群は、少なくとも4つ以上のレンズ成分で構成されていることを特徴とする請求項1~5のいずれか一項に記載の変倍光学系。
- 前記第2レンズ群は、物体側から順に並んだ、正の屈折力を有する第21レンズ群と、正の屈折力を有する第22レンズ群とからなり、
前記第21レンズ群を合焦レンズ群として像側に移動させることにより無限遠から近距離物体への合焦を行うことを特徴とする請求項1~6のいずれか一項に記載の変倍光学系。 - 請求項1~7のいずれか一項に記載の変倍光学系を搭載することを特徴とする光学機器。
- 負の屈折力を有する第1レンズ群と、正の屈折力を有する第2レンズ群とを有する変倍光学系の製造方法であって、
前記第2レンズ群より像側に配置された中間群を有し、
前記中間群より像側に配置され、光軸と直交方向の成分を持つように移動可能に構成された防振レンズ群を有し、
少なくとも、前記第1レンズ群と前記第2レンズ群との間隔と、前記第2レンズ群と前記中間群との間隔とを変化させることにより変倍を行い、
以下の条件式を満足するように、
レンズ鏡筒内に各レンズを配置することを特徴とする変倍光学系の製造方法。
1.000 < f(1~Gn)t/ft < 100.000
但し、
f(1~Gn)t:望遠端状態における前記第1レンズ群から前記中間群までの合成焦点距離、
ft:望遠端状態における全系の焦点距離。
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