JP2014038255A - Imaging optical system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact and light weight imaging optical system that has an excellent vibration-proof function, has excellently corrected various aberrations and has high optical performance.SOLUTION: The imaging optical system comprises in order from an object side: a first lens group L1 having positive refractive power; a second lens group L2 having negative refractive power; and a third lens group L3 having positive refractive power. The first lens group includes an eleventh lens group L11 and a twelfth lens group L12, and the eleventh lens group is composed of a positive lens with a convex surface directed toward the object side, a positive lens with the concave surface directed toward the object side and a double concave lens. The twelfth lens group is a cemented lens of a concave lens with the convex surface directed toward the object side and a positive lens with the convex surface directed toward the object side. Upon focusing, the second lens group moves in an optical axis, and the third lens group includes a thirty-first lens group L31 having positive refractive power, a thirty-second lens group L32 having negative refractive power and a thirty-third lens group L33 having positive refractive power. Upon vibration-proofing, the thirty-second lens group moves in a direction orthogonal to the optical direction, and satisfies a predetermined conditional expression.

Description

  The present invention relates to an imaging optical system suitable for a photographic lens used in an imaging apparatus such as a still camera or a video camera. In particular, the manufacturing sensitivity is weak and the vibration of the optical system is corrected while keeping the telephoto ratio of the lens small. The present invention relates to an imaging optical system that has a function of suppressing blurring in a photographed image, that is, a so-called anti-vibration function, and has both high optical performance.

  Conventionally, as a long focal length imaging optical system, in order from the object side to the image plane side, a first lens unit L1 having a positive refractive power, a second lens unit L2 having a negative refractive index, and a first lens unit having a positive refractive index. A telephoto imaging optical system having three lens units L3 is known.

JP-A-6-201988 Japanese Patent No. 3486541 Japanese Patent No. 3745104

  The imaging optical system disclosed in Patent Document 1 has various aberrations corrected well while having an image stabilization function. However, since vibration is prevented by the third group having a positive refractive power that is heavy and has a large outer diameter, the vibration isolation mechanism is increased in size and the outer diameter of the product cannot be reduced.

  In addition, the imaging optical systems disclosed in Patent Documents 2 and 3 have an anti-vibration function, corrects various aberrations well, and further divides the third group into three to prevent the optical axis during anti-vibration. A part of a lens group (hereinafter referred to as an anti-vibration group) moving in a direction perpendicular to the direction is reduced in size. However, although the telephoto ratio is large, the performance at the time of image stabilization is reduced, such as fluctuations in coma and astigmatism due to the eccentricity at the time of image stabilization.

  The present invention has been made in view of such a situation, while keeping the telephoto ratio of the lens small, the manufacturing sensitivity is weak, the lens has a good anti-vibration function, and various aberrations are corrected well. An object of the present invention is to provide a light imaging optical system having high optical performance.

The first invention, which is a means for solving the above-described problems, includes a first lens unit L1 having a positive refractive power and a second lens unit L2 having a negative refractive power in order from the object side to the image plane side. And a third lens unit L3 having a positive refractive power, the first lens unit L1 has an eleventh lens unit L11 and a twelfth lens unit L12, and the eleventh lens unit L11 is an object. And a positive lens having a convex surface facing the object side, a positive lens having a convex surface facing the object side, and a biconcave lens. The twelfth lens unit L12 has a concave lens having a convex surface facing the object side and a convex surface facing the object side. The second lens unit L2 moves in the optical axis direction during focusing, and the third lens unit L3 includes a 31st lens unit L31 having a positive refractive power and a negative refraction. 32nd lens group L32 with power and positive refractive power The thirty-third lens unit L33, and the thirty-second lens unit L32 moves in a direction perpendicular to the optical axis during image stabilization, and satisfies the following conditional expressions (1) to (6): An imaging optical system.
(1) 0.45 <f1 / f <0.60
(2) 0.35 <| f2 | / f <0.65
(3) 0.60 <f3 / f <3.00
(4) 0.50 <f31 / f <1.50
(5) 0.15 <| f32 | / f <0.20
(6) 0.15 <f33 / f <0.30
fi: focal length of the i-th lens group f: focal length of the entire imaging optical system

The second invention is an imaging optical system according to the first invention, further satisfying conditional expressions (7) to (9) shown below.
(7) −0.90 <SF1 <−0.64
(8) -1.80 <SF2 <-0.53
(9) -0.10 <SF3 <0.80
SF1: Form factor SF1 of the first lens G1 which is the most object side lens of the eleventh lens group L11 SF2: Shape factor SF2 of the second lens G2 which is the second lens from the object side of the eleventh lens group L11 Form factor SFn of the third lens G3, which is the third lens from the object side of the lens unit L11: When the curvature radius on the object side of the nth lens from the object side is R1n and the curvature radius on the image side is R2n
SFn = (R1n + R2n) / (R1n-R2n)
Form factor represented by

According to a third aspect of the present invention, there is provided the imaging optical system according to the first or second aspect of the invention, further satisfying conditional expressions (10) and (11) shown below.
(10) 3.10 <SF4 <4.50
(11) -1.80 <SF5 <-1.35
SF4: Form factor of the fourth lens G4 which is the most object side lens of the twelfth lens group L12 SF5: Shape factor of the fifth lens G5 which is the second lens from the object side of the twelfth lens group L12

  According to the present invention, while keeping the telephoto ratio of the lens small, the manufacturing sensitivity is weak, the image stabilization function is good, the image stabilization function is well corrected, the small and light, and the high optical performance. An optical system can be provided.

It is a lens block diagram of Example 1 of the present invention. FIG. 6 is a longitudinal aberration diagram at an object distance of infinity in Example 1 of the present invention. (A) is a lateral aberration diagram of the first embodiment of the present invention at infinite object distance, and (b) is a lateral chromatic aberration diagram of g-line and C-line with respect to d-line at infinite object distance of the first embodiment of the present invention. It is. It is a lateral aberration at the time of 0.3 degree camera-shake correction | amendment in the infinite object distance of Example 1 of this invention. FIG. 6 is a longitudinal aberration diagram at an object distance of 12000 mm in Example 1 of the present invention. (A) is a lateral aberration diagram at an object distance of 12000 mm in Example 1 of the present invention, and (b) is a lateral chromatic aberration diagram of g-line and C-line with respect to d-line at an object distance of 12000 mm in Example 1 of the present invention. . It is a lateral aberration at the time of 0.3 degree hand-shake correction | amendment in the object distance 12000mm of Example 1 of this invention. It is a lens block diagram of Example 2 of this invention. It is a longitudinal aberration figure in the object distance infinity of Example 2 of this invention. (A) is a lateral aberration diagram of the second embodiment of the present invention at infinite object distance, and (b) is a lateral chromatic aberration diagram of g-line and C-line with respect to d-line at infinite object distance of the second embodiment of the present invention. It is. It is a lateral aberration at the time of 0.3 degree camera-shake correction | amendment in the object distance infinity of Example 2 of this invention. It is a longitudinal aberration figure in object distance 12000mm of Example 2 of this invention. (A) is a lateral aberration diagram of Example 2 of the present invention at an object distance of 12000 mm, and (b) is a lateral chromatic aberration diagram of g-line and C-line with respect to d-line at an object distance of 12000 mm of Example 2 of the present invention. . It is a lateral aberration at the time of 0.3 degree camera-shake correction in the object distance 12000mm of Example 2 of this invention. It is a lens block diagram of Example 3 of the present invention. It is a longitudinal aberration figure in the object distance infinity of Example 3 of this invention. (A) is a lateral aberration diagram at infinite object distance of Example 3 of the present invention, and (b) is a lateral chromatic aberration diagram of g-line and C-line with respect to d-line at infinite object distance of Example 3 of the present invention. It is. It is a lateral aberration at the time of 0.3 degree camera-shake correction | amendment in the object distance infinity of Example 3 of this invention. It is a longitudinal aberration figure in object distance 12000mm of Example 3 of this invention. (A) is a lateral aberration diagram in Example 3 of the present invention at an object distance of 12000 mm, and (b) is a lateral chromatic aberration diagram of g-line and C-line with respect to d-line in Example 3 of the present invention at an object distance of 12000 mm. . It is a lateral aberration at the time of 0.3 degree camera-shake correction | amendment in the object distance 12000mm of Example 3 of this invention. It is a lens block diagram of Example 4 of this invention. It is a longitudinal aberration figure in the object distance infinity of Example 4 of this invention. (A) is a lateral aberration diagram at infinite object distance of Example 4 of the present invention, and (b) is a lateral chromatic aberration diagram of g-line and C-line with respect to d-line at infinite object distance of Example 4 of the present invention. It is. It is a lateral aberration at the time of 0.3 degree camera-shake correction | amendment in the object distance infinity of Example 4 of this invention. It is a longitudinal aberration figure in object distance 12000mm of Example 4 of this invention. (A) is a lateral aberration diagram at an object distance of 12000 mm in Example 4 of the present invention, and (b) is a lateral chromatic aberration diagram of g-line and C-line with respect to d-line at an object distance of 12000 mm in Example 4 of the present invention. . It is a lateral aberration at the time of 0.3 degree camera-shake correction | amendment in the object distance 12000mm of Example 4 of this invention. It is a lens block diagram of Example 5 of this invention. It is a longitudinal aberration figure in the object distance infinity of Example 5 of this invention. (A) is a lateral aberration diagram at infinite object distance of Example 5 of the present invention, and (b) is a lateral chromatic aberration diagram of g-line and C-line with respect to d-line at infinite object distance of Example 5 of the present invention. It is. It is a lateral aberration at the time of 0.3 degree camera-shake correction | amendment in the object distance infinity of Example 5 of this invention. It is a longitudinal aberration figure in object distance 12000mm of Example 5 of this invention. (A) is a lateral aberration diagram at an object distance of 12000 mm in Example 5 of the present invention, and (b) is a lateral chromatic aberration diagram of g-line and C-line with respect to d-line at an object distance of 12000 mm in Example 5 of the present invention. . It is a lateral aberration at the time of 0.3 degree camera-shake correction | amendment in the object distance 12000mm of Example 5 of this invention. It is a lens block diagram of Example 6 of this invention. It is a longitudinal aberration figure in the object distance infinity of Example 6 of this invention. (A) is a lateral aberration diagram of the sixth embodiment of the present invention at infinite object distance, and (b) is a lateral chromatic aberration diagram of the g-line and C-line with respect to the d-line at infinite object distance of the sixth embodiment of the present invention. It is. It is a lateral aberration at the time of 0.3 degree camera-shake correction | amendment in the object distance infinity of Example 6 of this invention. It is a longitudinal aberration figure in object distance 12000mm of Example 6 of this invention. (A) is a lateral aberration diagram in Example 6 of the present invention at an object distance of 12000 mm, and (b) is a lateral chromatic aberration diagram of g-line and C-line with respect to d-line in Example 6 of the present invention at an object distance of 12000 mm. . It is a lateral aberration at the time of 0.3 degree camera-shake correction | amendment in the object distance 12000mm of Example 6 of this invention. It is a lens block diagram of Example 7 of this invention. It is a longitudinal aberration figure in the object distance infinity of Example 7 of this invention. (A) is a lateral aberration diagram at infinite object distance of Example 7 of the present invention, and (b) is a lateral chromatic aberration diagram of g-line and C-line with respect to d-line at infinite object distance of Example 7 of the present invention. It is. It is a lateral aberration at the time of 0.3 degree camera-shake correction | amendment in infinite object distance of Example 7 of this invention. It is a longitudinal aberration figure in object distance 12000mm of Example 7 of this invention. (A) is a lateral aberration diagram in Example 7 of the present invention at an object distance of 12000 mm, and (b) is a lateral chromatic aberration diagram of g-line and C-line with respect to d-line in Example 7 of the present invention at an object distance of 12000 mm. . It is a lateral aberration at the time of 0.3 degree camera shake correction | amendment in the object distance 12000mm of Example 7 of this invention. It is a lens block diagram of Example 8 of this invention. It is a longitudinal aberration figure in the object distance infinity of Example 8 of this invention. (A) is a lateral aberration diagram at infinite object distance of Example 8 of the present invention, and (b) is a chromatic aberration diagram of g-line and C-line magnification with respect to d-line at infinite object distance of Example 8 of the present invention. It is. It is a lateral aberration at the time of 0.3 degree camera-shake correction | amendment in infinite object distance of Example 8 of this invention. It is a longitudinal aberration figure in object distance 12000mm of Example 8 of this invention. (A) is a lateral aberration diagram at an object distance of 12000 mm in Example 8 of the present invention, and (b) is a lateral chromatic aberration diagram of g-line and C-line with respect to d-line at an object distance of 12000 mm in Example 8 of the present invention. . It is a lateral aberration at the time of 0.3 degree camera shake correction | amendment in the object distance 12000mm of Example 8 of this invention. It is a lens block diagram of Example 9 of this invention. It is a longitudinal aberration figure in the object distance infinity of Example 9 of this invention. (A) is a lateral aberration diagram at infinite object distance of Example 9 of the present invention, and (b) is a lateral chromatic aberration diagram of g-line and C-line with respect to d-line at infinite object distance of Example 9 of the present invention. It is. It is a lateral aberration at the time of 0.3 degree camera shake correction | amendment in the object distance infinity of Example 9 of this invention. It is a longitudinal aberration figure in object distance 12000mm of Example 9 of this invention. (A) is a lateral aberration diagram in Example 9 of the present invention at an object distance of 12000 mm, and (b) is a lateral chromatic aberration diagram of g-line and C-line with respect to d-line in Example 9 of the present invention at an object distance of 12000 mm. . It is a lateral aberration at the time of 0.3 degree camera-shake correction | amendment in the object distance 12000mm of Example 9 of this invention. It is a lens block diagram of Example 10 of this invention. It is a longitudinal aberration figure in the object distance infinity of Example 10 of this invention. (A) is a lateral aberration diagram at infinite object distance of Example 10 of the present invention, and (b) is a lateral chromatic aberration diagram of g-line and C-line with respect to d-line at infinite object distance of Example 10 of the present invention. It is. It is a lateral aberration at the time of 0.3 degree camera-shake correction | amendment in the object distance infinity of Example 10 of this invention. It is a longitudinal aberration figure in object distance 12000mm of Example 10 of this invention. (A) is a lateral aberration diagram at an object distance of 12000 mm in Example 10 of the present invention, and (b) is a lateral chromatic aberration diagram of g-line and C-line with respect to d-line at an object distance of 12000 mm in Example 10 of the present invention. . It is a lateral aberration at the time of 0.3 degree camera shake correction | amendment in the object distance 12000mm of Example 10 of this invention. It is a lens block diagram of Example 11 of this invention. It is a longitudinal aberration figure in the object distance infinity of Example 11 of this invention. (A) is a lateral aberration diagram at infinite object distance of Example 11 of the present invention, and (b) is a lateral chromatic aberration diagram of g-line and C-line with respect to d-line at infinite object distance of Example 11 of the present invention. It is. It is a lateral aberration at the time of 0.3 degree camera-shake correction | amendment in the object distance infinity of Example 11 of this invention. It is a longitudinal aberration figure in object distance 12000mm of Example 11 of this invention. (A) is a lateral aberration diagram in Example 11 of the present invention at an object distance of 12000 mm, and (b) is a lateral chromatic aberration diagram of g-line and C-line with respect to d-line in Example 11 of the present invention at an object distance of 12000 mm. . It is a lateral aberration at the time of 0.3 degree camera-shake correction in the object distance of 12000 mm of Example 11 of this invention. It is a lens block diagram of Example 12 of this invention. It is a longitudinal aberration figure in the object distance infinity of Example 12 of this invention. (A) is a lateral aberration diagram at infinite object distance of Example 12 of the present invention, and (b) is a lateral chromatic aberration diagram of g-line and C-line with respect to d-line at infinite object distance of Example 12 of the present invention. It is. It is a lateral aberration at the time of 0.3 degree camera shake correction | amendment in the object distance infinity of Example 12 of this invention. It is a longitudinal aberration figure in object distance 12000mm of Example 12 of this invention. (A) is a lateral aberration diagram in Example 12 of the present invention at an object distance of 12000 mm, and (b) is a lateral chromatic aberration diagram of g-line and C-line with respect to d-line in Example 12 of the present invention at an object distance of 12000 mm. . It is a lateral aberration at the time of 0.3 degree camera shake correction | amendment in the object distance 12000mm of Example 12 of this invention.

  The imaging optical system according to this embodiment includes, in order from the object side to the image plane side, a first lens unit L1 having a positive refractive power, a second lens unit L2 having a negative refractive power, and a positive refractive power. The first lens group L1 has an eleventh lens group L11 and a twelfth lens group L12, and the eleventh lens group L11 has a convex surface facing the object side. The twelfth lens unit L12 includes a positive lens, a positive lens having a convex surface directed toward the object side, and a biconcave lens. The twelfth lens unit L12 is formed by bonding a concave lens having a convex surface toward the object side and a positive lens having a convex surface directed toward the object side. The second lens unit L2 moves in the optical axis direction during focusing. The third lens unit L3 includes a thirty-first lens unit L31 having a positive refractive power and a thirty-second lens having a negative refractive power. Group L32 and a thirty-third lens group having positive refractive power And a 33, the third-second lens group L32 has a configuration that moves in a direction perpendicular to the optical axis upon vibration reduction.

  In the imaging optical system according to the present embodiment, the first lens unit L1 has a role of converging a high light ray height as a whole and reducing a light ray incident on the second lens unit L2. The first lens unit L1 has a positive refractive index and an eleventh lens unit L11 having an effect of converging a high ray height, and corrects spherical aberration and chromatic aberration that are generated by converging the ray height. It is divided into a twelfth lens group L12 having an action of correcting aberrations occurring as a whole of the lens group L1 and guiding it to the second lens group L2, which is a focus lens group. The positive lens of the first lens unit L1 uses a low-dispersion glass to minimize the generation of the secondary spectrum, and the concave lens is a negative lens having a relatively large dispersion in order to correct chromatic aberration generated in the positive lens. By being configured, it is possible to properly correct not only the spherical aberration generated in the first lens unit L1 but also the chromatic aberration and guide the light beam to the second lens unit L2.

  In the imaging optical system according to the present embodiment, the second lens unit L2 moves along the optical axis during focusing, and has a role of guiding light rays to an appropriate imaging position while appropriately correcting various aberrations. . Further, the second lens unit L2 requires a small amount of movement for focusing and is lightweight. Therefore, it is possible to reduce the size of the motor that drives the second lens unit L2, and it is possible to reduce the size of the photographing lens. Further, if the motor has the same performance, the second lens unit L2 can be driven at a higher speed, so that high-speed focusing can be realized.

  In the imaging optical system according to the present embodiment, the third lens unit L3 moves the lens in the direction perpendicular to the optical axis and the role of correcting the remaining aberrations of the first lens unit L1 and the second lens unit L2. And have a role of anti-vibration. However, when the entire third lens unit L3 is moved, the moving lens is heavy, so that the motor for moving the third lens unit L3 is increased in size for image stabilization. Therefore, the third lens unit L3 is divided into three and given roles. The thirty-first lens unit L31 corrects various aberrations generated in the first lens unit L1 and the second lens unit L2, and further converges the light that has passed through the second lens unit L2, and enters the thirty-second lens unit L32. The height of the light beam is lowered to make the image stabilization unit smaller and lighter, and the thirty-second lens unit L32 has a function to perform correction by moving in the direction perpendicular to the optical axis during image stabilization. Further, the thirty-third lens unit L33 has a role of satisfying the amount of displacement at the image plane position while keeping the amount of decentering movement of the thirty-second lens unit L32 small. Further, in the imaging optical system according to the present embodiment, miniaturization and high performance with various aberrations suppressed are achieved by optimizing the refractive power arrangement of each lens group.

In addition, the imaging optical system of each example has a feature that satisfies the following conditional expressions (1) to (6).
(1) 0.45 <f1 / f <0.60
(2) 0.35 <| f2 | / f <0.65
(3) 0.60 <f3 / f <3.00
(4) 0.50 <f31 / f <1.50
(5) 0.15 <| f32 | / f <0.20
(6) 0.15 <f33 / f <0.30
fi: focal length of the i-th lens group f: focal length of the entire imaging optical system

  Conditional expressions (1) to (3) define the focal length of each lens group in order for the imaging optical system according to the present invention to achieve both miniaturization and high performance.

  If the upper limit value of conditional expression (1) is exceeded, the focal length of the first lens unit L1 becomes longer and the positive refractive power becomes weaker. Therefore, it is suitable for correcting various aberrations generated in the first lens unit L1, particularly spherical aberration. However, the telephoto type action is weakened, and not only the overall length of the imaging optical system is extended, but also the height of the light incident on the second lens unit L2 cannot be sufficiently lowered, and the lens weight also increases. It is difficult to reduce the size of the imaging optical system. Therefore, in order to obtain the effect of the present invention more reliably, it is preferable that the upper limit value of conditional expression (1) is 0.60.

  If the lower limit value of conditional expression (1) is not reached, the focal length of the first lens unit L1 becomes short and the positive refractive power becomes strong. Therefore, although it is advantageous for miniaturization of the imaging optical system, various aberrations generated in the first lens unit L1, particularly high-order spherical aberration at the time of focusing on infinity increase, and this can be corrected well. Becomes difficult. Therefore, in order to obtain the effect of the present invention more reliably, the lower limit value of conditional expression (1) is preferably set to 0.45.

  When the upper limit of conditional expression (2) is exceeded, the focal length of the second lens unit L2 becomes longer, and the amount of movement of the second lens unit L2 accompanying focusing increases. Therefore, a wide space must be ensured in the imaging optical system, which is an obstacle to miniaturization of the imaging optical system. Therefore, in order to obtain the effect of the present invention more reliably, the upper limit value of conditional expression (2) is preferably 0.65.

  If the lower limit value of conditional expression (2) is not reached, the focal length of the second lens unit L2 becomes short, and the amount of movement of the second lens unit L2 due to focusing decreases. Although this is effective for miniaturization of the imaging optical system, fluctuations in coma due to focusing increase, and it becomes difficult to correct this well. Therefore, in order to more reliably obtain the effects of the present invention, the lower limit value of conditional expression (2) is preferably set to 0.35.

  If the upper limit value of conditional expression (3) is exceeded, the focal length of the third lens unit L3 becomes longer. As a result, the back focus becomes too long, which is an obstacle to miniaturization of the imaging optical system. Therefore, in order to obtain the effect of the present invention more reliably, it is preferable to set the upper limit value of conditional expression (3) to 3.00.

  If the lower limit value of conditional expression (3) is not reached, the focal length of the third lens unit L3 is shortened, the number of the third lens unit L3 is increased in order to correct spherical aberration and coma flare, and the imaging optical system is reduced in size. It becomes an obstacle to the conversion. Therefore, in order to obtain the effect of the present invention more reliably, it is preferable that the lower limit value of the conditional expression (3) is 0.60.

  Conditional expressions (4) to (6) indicate that a good image surface can be obtained even during image stabilization while obtaining an appropriate amount of image plane movement when the thirty-second lens unit L32 is moved in a direction perpendicular to the optical axis during image stabilization. In order to obtain performance, the focal length of each lens unit included in the third lens unit L3 is defined.

  When the upper limit value of conditional expression (4) is exceeded, the focal length of the 31st lens unit L31 becomes long. However, in order to maintain a good aberration balance, the focal points of the second lens unit L2 and the 33rd lens unit L33 are particularly good. It is necessary to change the distance. As the focal length of the second lens unit L2 increases, the aberration of the second lens unit L2 itself decreases. However, the focal length of the thirty-third lens unit has to be reduced, and coma aberration, astigmatism, and chromatic aberration of the thirty-third lens unit L33 itself increase, and the performance of the high image height portion decreases. Therefore, in order to obtain the effect of the present invention more reliably, the upper limit value of conditional expression (4) is preferably set to 1.50.

  If the lower limit value of conditional expression (4) is not reached, the focal length of the thirty-first lens unit L31 is shortened. However, in order to maintain a good aberration balance while maintaining the focal length of the imaging optical system, the second lens group L31 is particularly suitable. It is necessary to change the focal lengths of the lens unit L2 and the thirty-second lens unit L32. When the focal length of the second lens unit L2 increases, the aberration of the second lens unit L2 itself decreases. However, the focal length of the thirty-second lens unit L32 must be reduced, and the coma aberration of the thirty-second lens unit L32 itself and Chromatic aberration increases. At the time of image stabilization, it is necessary to move the thirty-second lens unit L32 in the direction perpendicular to the optical axis, and when moving to the plus side quadrant, the meridional astigmatism of the plus image height is displaced to the plus side, and the minus image height. The meridional astigmatism shifts to the negative side to generate asymmetric astigmatism, and the coma and chromatic aberration generated by the 32nd lens unit L32 itself deteriorates the performance in a high image height region. In addition, this leads to a decrease in performance in the intermediate region of the image height, making correction difficult. Therefore, in order to obtain the effect of the present invention more reliably, the lower limit value of conditional expression (4) is preferably set to 0.50.

  If the upper limit value of conditional expression (5) is exceeded, the focal length of the thirty-second lens unit L32 becomes longer, the ratio of the image plane movement amount to the unit movement amount of the image stabilization group becomes smaller, and the image stabilization movement amount needs to be increased. Occurs. For this reason, the motor for moving the image stabilizing group becomes large, which is an obstacle to a small imaging optical system. Therefore, in order to obtain the effect of the present invention more reliably, it is preferable to set the upper limit value of conditional expression (5) to 0.20.

  If the lower limit value of conditional expression (5) is not reached, the focal length of the thirty-second lens unit L32 is shortened and the amount of vibration reduction can be reduced, but the coma aberration and chromatic aberration of the thirty-second lens unit L32 itself are increased. Distortion is also greatly deteriorated, and it is difficult to correct this well. Therefore, in order to more reliably obtain the effects of the present invention, the lower limit value of conditional expression (5) is preferably set to 0.15.

  If the upper limit value of conditional expression (6) is exceeded, the focal length of the 33rd lens unit L33 becomes long, and the image forming position sufficient for the light beam passing through the 32nd lens unit L32 during image stabilization to perform image stabilization. Since the displacement cannot be obtained, the vibration-proof movement amount of the thirty-second lens unit L32 increases. Therefore, in order to obtain the effect of the present invention more reliably, it is preferable to set the upper limit value of conditional expression (6) to 0.30.

  If the lower limit value of conditional expression (6) is not reached, the focal length of the 33rd lens unit L33 is shortened at the time of image stabilization and the back focus can be shortened to make the entire system small. When the 32 lens unit L32 is moved in the direction perpendicular to the optical axis, the sagittal astigmatism of the plus image height when the lens unit L32 is moved to the plus side quadrant is displaced to the plus side. As a result, coma is deteriorated in the intermediate region of the negative image height, and the performance is deteriorated in the intermediate region of the image height, making correction difficult. Therefore, in order to more reliably obtain the effects of the present invention, the lower limit value of conditional expression (6) is preferably set to 0.15.

  The second lens unit L2 includes, in order from the object side, only a lens in which a meniscus negative lens having a convex surface facing the object side and a meniscus positive lens having a convex surface facing the object side are cemented. With such a configuration, it is possible to reduce the weight of the focus lens group, and it is possible to reduce the size and weight of the photographing lens and to achieve high-speed focusing operation.

Further, the optical system of each example further satisfies the following conditional expressions (7) to (9).
(7) −0.90 <SF1 <−0.64
(8) -1.80 <SF2 <-0.53
(9) -0.10 <SF3 <0.80
SF1: Form factor SF1 of the first lens G1 which is the most object side lens of the eleventh lens group L11 SF2: Shape factor SF2 of the second lens G2 which is the second lens from the object side of the eleventh lens group L11 Form factor SFn of the third lens G3, which is the third lens from the object side of the lens unit L11: When the curvature radius on the object side of the nth lens from the object side is R1n and the curvature radius on the image side is R2n
SFn = (R1n + R2n) / (R1n-R2n)
Form factor represented by

  Conditional expression (7) defines the shape of the first lens G1 constituting the first lens unit L1. The first lens G1 is generated in this lens by defining the shape of the object-side surface R11 and the shape of the image-side surface R21 of the first lens G1, which is the most object-side lens of the eleventh lens unit L11. It is possible to minimize the occurrence of longitudinal chromatic aberration by reducing the amount of spherical aberration and selecting a low-dispersion glass material having a relatively small refractive index.

  If the lower limit of conditional expression (7) is not reached, the refractive power burden of the positive refractive power of the first lens G1 is determined on the object side surface R11. In that case, spherical aberration generated on the R11 surface increases, leading to performance degradation. On the other hand, if the upper limit of conditional expression (7) is exceeded, the refractive power burden on the surface R21 on the image plane side will increase, leading to an increase in spherical aberration and a decrease in performance. Therefore, in order to obtain the effect of the present invention more reliably, it is desirable to set a radius of curvature in the range of conditional expression (7) for the positive lens constituting the first lens G1.

  Conditional expression (8) defines the shape of the second lens G2 constituting the first lens unit L1. By defining the shape of the object-side surface R12 and the shape of the image-side surface R22 of the second lens G2, the amount of manufacturing sensitivity of this lens is reduced, and the axial chromatic aberration is the same as that of the first lens G1. It is possible to minimize the generation of quantities.

  If the lower limit of conditional expression (8) is not reached, the lens shape of the third lens G3 having positive refractive power becomes a tight convex meniscus shape. Although the light ray height of the second lens G2 is lowered due to the converging action of the first lens G1 having a positive refractive power, it indicates that the radius of curvature of R12 is reduced, and the generation of spherical aberration is also increased. If the upper limit of (8) is exceeded, the second lens G2, which is a positive lens, is not a meniscus lens but a biconvex lens, and the height of the light incident on R22 is relatively high, and the incident angle incident on R22 is Performance increases due to variations within manufacturing tolerances during manufacturing Not only spherical aberration that affects the center of the image plane, but also astigmatism and field curvature aberration that affect the periphery of the image plane, and forms an image on the entire image plane The performance will be reduced.

  Conditional expression (9) defines the shape of the third lens G3 constituting the first lens unit L1. By defining the shape of the object-side surface R13 and the shape of the image-side surface R23 of the third lens G3, the third lens G3, which is a biconcave lens having negative refractive power, becomes the first lens G1 and the second lens G3. It is possible to accurately correct the axial chromatic aberration generated in the lens G2.

  If the lower limit of conditional expression (9) is not reached, the refractive power burden on the object-side surface R13 of the third lens G3 having negative refractive power becomes too large, and a third-order aberration coefficient on the object-side surface R13 increases. This makes it difficult to correct with the rear lens. Further, the fact that the aberration coefficient of the surface R13 is large means that the manufacturing sensitivity is high, and it is easy to lead to the occurrence of decentration aberration and the performance deterioration during the manufacturing. Further, if the upper limit of conditional expression (8) is exceeded, it means that the radius of curvature of the surface R13 becomes large, and chromatic aberration generated in the positive lenses of the first lens G1 and the second lens G2 is corrected by the third lens G3. Becomes difficult.

In addition, the optical system of each example further satisfies the following conditional expressions (10) and (11).
(10) 3.10 <SF4 <4.50
(11) -1.80 <SF5 <-1.35
SF4: Form factor of the fourth lens G4 which is the most object side lens of the twelfth lens group L12 SF5: Shape factor of the fifth lens G5 which is the second lens from the object side of the twelfth lens group L12

  Conditional expressions (10) and (11) are conditions that define the shapes of the negative lens and the positive lens constituting the twelfth lens unit L12. The twelfth lens unit L12 has a role of correcting axial chromatic aberration and spherical aberration generated in the eleventh lens unit L11 and guiding light to the second lens unit L2 which is a focus lens unit.

  When the upper limit of conditional expression (10) or the lower limit of conditional expression (11) is exceeded, the amount of spherical aberration generated in the twelfth lens group L12 decreases, and the spherical aberration generated in the eleventh lens group L11 is sufficiently reduced. It becomes impossible to correct with. On the other hand, when the lower limit of conditional expression (10) or the upper limit of conditional expression (11) is exceeded, the generation of spherical aberration becomes excessive despite the refracting power of the twelfth lens unit L12 becoming weak.

  Next, a lens configuration of an example according to the imaging optical system of the present invention will be described. In the following description, lens configurations are described in order from the object side to the image plane side.

  FIG. 1 is a lens configuration diagram of an imaging optical system according to Example 1 of the present invention. The first lens unit L1 includes a biconvex lens having a positive refractive power, a lens having a convex toward the object side having a positive refractive power, and a biconcave lens having a negative refractive power. And a twelfth lens unit L12 that is a cemented lens composed of a lens having a convex power toward the object side having a refractive power and a lens having a convex power toward the object side having a positive refractive power. Have the power of refraction.

The second lens unit L2 includes a cemented lens including a lens having a negative refractive power and a convex surface facing the object side, and a lens having a positive refractive power and the convex surface facing the object side. Has negative refractive power.
The second lens unit L2 moves toward the image plane along the optical axis during focusing from infinity to a short distance.

  The thirty-first lens unit L31 includes a lens having a convex surface facing the object side having a positive refractive power, and has a positive refractive power as a whole.

  The thirty-second lens unit L32 includes a cemented lens including a lens having a positive refractive power and a convex surface facing the image surface and a biconcave lens having negative refractive power, and a biconcave lens having negative refractive power. As a whole, it has negative refractive power. The thirty-second lens unit L32 moves in a direction perpendicular to the optical axis during camera shake correction.

  The thirty-third lens unit L33 includes a biconvex lens having a positive refractive power, and a cemented lens including a biconvex lens having a positive refractive power and a biconcave lens having a negative refractive power. Have power.

  FIG. 6 is a lens configuration diagram of the imaging optical system according to Example 2 of the present invention. The first lens unit L1 includes a biconvex lens having a positive refractive power, a lens having a convex toward the object side having a positive refractive power, and a biconcave lens having a negative refractive power. And a twelfth lens unit L12 that is a cemented lens composed of a lens having a convex power toward the object side having a refractive power and a lens having a convex power toward the object side having a positive refractive power. Have the power of refraction.

  The second lens unit L2 includes a cemented lens including a lens having a negative refractive power and a convex surface facing the object side, and a lens having a positive refractive power and the convex surface facing the object side. Has negative refractive power. The second lens unit L2 moves toward the image plane along the optical axis during focusing from infinity to a short distance.

  The thirty-first lens unit L31 is composed of a biconvex lens having a positive refractive power, and has a positive refractive power as a whole.

  The thirty-second lens unit L32 includes a cemented lens including a lens having a positive refractive power and a convex surface facing the image surface and a biconcave lens having negative refractive power, and a biconcave lens having negative refractive power. As a whole, it has negative refractive power. The thirty-second lens unit L32 moves in a direction perpendicular to the optical axis during camera shake correction.

  The thirty-third lens unit L33 includes a biconvex lens having a positive refractive power, and a cemented lens including a biconvex lens having a positive refractive power and a biconcave lens having a negative refractive power. Have power.

  FIG. 6 is a lens configuration diagram of the imaging optical system according to the third embodiment of the present invention. The first lens unit L1 includes a biconvex lens having a positive refractive power, a lens having a convex toward the object side having a positive refractive power, and a biconcave lens having a negative refractive power. And a twelfth lens unit L12 that is a cemented lens composed of a lens having a convex power toward the object side having a refractive power and a lens having a convex power toward the object side having a positive refractive power. Have the power of refraction.

  The second lens unit L2 includes a cemented lens including a lens having a negative refractive power and a convex surface facing the object side, and a lens having a positive refractive power and the convex surface facing the object side. Has negative refractive power. The second lens unit L2 moves toward the image plane along the optical axis during focusing from infinity to a short distance.

  The thirty-first lens unit L31 is composed of a biconvex lens having a positive refractive power, and has a positive refractive power as a whole.

The thirty-second lens unit L32 includes a lens having a convex surface facing the image surface having a positive refractive power, a biconcave lens having a negative refractive power, and a biconcave lens having a negative refractive power. Have the power of refraction.
The thirty-second lens unit L32 moves in a direction perpendicular to the optical axis during camera shake correction.

  The thirty-third lens unit L33 includes a biconvex lens having a positive refractive power, a biconvex lens having a positive refractive power, and a biconcave lens having a negative refractive power, and has a positive refractive power as a whole. .

  FIG. 6 is a lens configuration diagram of the imaging optical system according to Example 4 of the present invention. The first lens unit L1 includes a biconvex lens having a positive refractive power, a lens having a convex toward the object side having a positive refractive power, and a biconcave lens having a negative refractive power. And a twelfth lens unit L12 that is a cemented lens composed of a lens having a convex power toward the object side having a refractive power and a lens having a convex power toward the object side having a positive refractive power. Have the power of refraction.

  The second lens unit L2 includes a cemented lens including a lens having a negative refractive power and a convex surface facing the object side, and a lens having a positive refractive power and the convex surface facing the object side. Has negative refractive power. The second lens unit L2 moves toward the image plane along the optical axis during focusing from infinity to a short distance.

  The thirty-first lens unit L31 is composed of a biconvex lens having a positive refractive power, and has a positive refractive power as a whole.

The thirty-second lens unit L32 includes a lens having a convex surface facing the image surface having a positive refractive power, a biconcave lens having a negative refractive power, and a biconcave lens having a negative refractive power. Have the power of refraction.
The thirty-second lens unit L32 moves in a direction perpendicular to the optical axis during camera shake correction.

  The thirty-third lens unit L33 includes a biconvex lens having a positive refractive power, a biconvex lens having a positive refractive power, and a biconcave lens having a negative refractive power, and has a positive refractive power as a whole. .

  FIG. 6 is a lens configuration diagram of the imaging optical system according to Example 5 of the present invention. The first lens unit L1 includes a biconvex lens having a positive refractive power, a lens having a convex toward the object side having a positive refractive power, and a biconcave lens having a negative refractive power. And a twelfth lens unit L12 that is a cemented lens composed of a lens having a convex power toward the object side having a refractive power and a lens having a convex power toward the object side having a positive refractive power. Have the power of refraction.

  The second lens unit L2 includes a cemented lens including a lens having a negative refractive power and a convex surface facing the object side, and a lens having a positive refractive power and the convex surface facing the object side. Has negative refractive power. The second lens unit L2 moves toward the image plane along the optical axis during focusing from infinity to a short distance.

  The thirty-first lens unit L31 includes a lens having a convex surface facing the object side having a positive refractive power, and has a positive refractive power as a whole.

The thirty-second lens unit L32 includes a lens having a convex surface facing the image surface having a positive refractive power, a biconcave lens having a negative refractive power, and a biconcave lens having a negative refractive power. Have the power of refraction.
The thirty-second lens unit L32 moves in a direction perpendicular to the optical axis during camera shake correction.

  The thirty-third lens unit L33 includes a biconvex lens having a positive refractive power, a biconvex lens having a positive refractive power, and a biconcave lens having a negative refractive power, and has a positive refractive power as a whole. .

  FIG. 6 is a lens configuration diagram of the imaging optical system according to Example 6 of the present invention. The first lens unit L1 includes a biconvex lens having a positive refractive power, a lens having a convex toward the object side having a positive refractive power, and a biconcave lens having a negative refractive power. And a twelfth lens unit L12 that is a cemented lens composed of a lens having a convex power toward the object side having a refractive power and a lens having a convex power toward the object side having a positive refractive power. Have the power of refraction.

  The second lens unit L2 includes a cemented lens including a lens having a negative refractive power and a convex surface facing the object side, and a lens having a positive refractive power and the convex surface facing the object side. Has negative refractive power. The second lens unit L2 moves toward the image plane along the optical axis during focusing from infinity to a short distance.

  The thirty-first lens unit L31 is composed of a biconvex lens having a positive refractive power, and has a positive refractive power as a whole.

The thirty-second lens unit L32 includes a biconvex lens having a positive refractive power, a biconcave lens having a negative refractive power, and a biconcave lens having a negative refractive power, and has a negative refractive power as a whole. .
The thirty-second lens unit L32 moves in a direction perpendicular to the optical axis during camera shake correction.

  The thirty-third lens unit L33 includes a biconvex lens having a positive refractive power, a biconvex lens having a positive refractive power, and a lens having a convex toward the image surface side having a negative refractive power. Have the power of refraction.

  FIG. 6 is a lens configuration diagram of the imaging optical system according to Example 7 of the present invention. The first lens unit L1 includes a biconvex lens having a positive refractive power, a lens having a convex toward the object side having a positive refractive power, and a biconcave lens having a negative refractive power. And a twelfth lens unit L12 that is a cemented lens composed of a lens having a convex power toward the object side having a refractive power and a lens having a convex power toward the object side having a positive refractive power. Have the power of refraction.

  The second lens unit L2 includes a cemented lens including a lens having a negative refractive power and a convex surface facing the object side, and a lens having a positive refractive power and the convex surface facing the object side. Has negative refractive power. The second lens unit L2 moves toward the image plane along the optical axis during focusing from infinity to a short distance.

  The thirty-first lens unit L31 is composed of a biconvex lens having a positive refractive power, and has a positive refractive power as a whole.

The thirty-second lens unit L32 includes a biconvex lens having a positive refractive power, a biconcave lens having a negative refractive power, and a biconcave lens having a negative refractive power, and has a negative refractive power as a whole. .
The thirty-second lens unit L32 moves in a direction perpendicular to the optical axis during camera shake correction.

  The thirty-third lens unit L33 includes a biconvex lens having a positive refractive power, a biconvex lens having a positive refractive power, and a lens having a convex toward the image surface side having a negative refractive power. Have the power of refraction.

  FIG. 6 is a lens configuration diagram of the imaging optical system according to Example 8 of the present invention. The first lens unit L1 includes a biconvex lens having a positive refractive power, a lens having a convex toward the object side having a positive refractive power, and a biconcave lens having a negative refractive power. And a twelfth lens unit L12 that is a cemented lens composed of a lens having a convex power toward the object side having a refractive power and a lens having a convex power toward the object side having a positive refractive power. Have the power of refraction.

  The second lens unit L2 includes a cemented lens including a lens having a negative refractive power and a convex surface facing the object side, and a lens having a positive refractive power and the convex surface facing the object side. Has negative refractive power. The second lens unit L2 moves toward the image plane along the optical axis during focusing from infinity to a short distance.

  The thirty-first lens unit L31 includes a lens having a convex surface facing the object side having a positive refractive power, and has a positive refractive power as a whole.

The thirty-second lens unit L32 includes a lens having a convex surface facing the image surface having a positive refractive power, a biconcave lens having a negative refractive power, and a biconcave lens having a negative refractive power. Have the power of refraction.
The thirty-second lens unit L32 moves in a direction perpendicular to the optical axis during camera shake correction.

  The thirty-third lens unit L33 includes a biconvex lens having a positive refractive power, a biconvex lens having a positive refractive power, and a biconcave lens having a negative refractive power, and has a positive refractive power as a whole. .

  FIG. 6 is a lens configuration diagram of the imaging optical system according to Example 9 of the present invention. The first lens unit L1 includes a biconvex lens having a positive refractive power, a lens having a convex toward the object side having a positive refractive power, and a biconcave lens having a negative refractive power. And a twelfth lens unit L12 that is a cemented lens composed of a lens having a convex power toward the object side having a refractive power and a lens having a convex power toward the object side having a positive refractive power. Have the power of refraction.

  The second lens unit L2 includes a cemented lens including a lens having a negative refractive power and a convex surface facing the object side, and a lens having a positive refractive power and the convex surface facing the object side. Has negative refractive power. The second lens unit L2 moves toward the image plane along the optical axis during focusing from infinity to a short distance.

  The thirty-first lens unit L31 is composed of a biconvex lens having a positive refractive power, and has a positive refractive power as a whole.

The thirty-second lens unit L32 includes a biconvex lens having a positive refractive power, a biconcave lens having a negative refractive power, and a biconcave lens having a negative refractive power, and has a negative refractive power as a whole. .
The thirty-second lens unit L32 moves in a direction perpendicular to the optical axis during camera shake correction.

  The thirty-third lens unit L33 includes a biconvex lens having a positive refractive power, a biconvex lens having a positive refractive power, and a biconcave lens having a negative refractive power, and has a positive refractive power as a whole. .

  FIG. 6 is a lens configuration diagram of the imaging optical system according to Example 10 of the present invention. The first lens unit L1 includes a biconvex lens having a positive refractive power, a lens having a convex toward the object side having a positive refractive power, and a biconcave lens having a negative refractive power. And a twelfth lens unit L12 that is a cemented lens composed of a lens having a convex power toward the object side having a refractive power and a lens having a convex power toward the object side having a positive refractive power. Have the power of refraction.

  The second lens unit L2 includes a cemented lens including a lens having a negative refractive power and a convex surface facing the object side, and a lens having a positive refractive power and the convex surface facing the object side. Has negative refractive power. The second lens unit L2 moves toward the image plane along the optical axis during focusing from infinity to a short distance.

  The thirty-first lens unit L31 is composed of a biconvex lens having a positive refractive power, and has a positive refractive power as a whole.

The thirty-second lens unit L32 includes a biconvex lens having a positive refractive power, a biconcave lens having a negative refractive power, and a biconcave lens having a negative refractive power, and has a negative refractive power as a whole. .
The thirty-second lens unit L32 moves in a direction perpendicular to the optical axis during camera shake correction.

  The thirty-third lens unit L33 includes a biconvex lens having a positive refractive power, a biconvex lens having a positive refractive power, and a biconcave lens having a negative refractive power, and has a positive refractive power as a whole. .

  FIG. 6 is a lens configuration diagram of the imaging optical system according to Example 11 of the present invention. The first lens unit L1 includes a biconvex lens having a positive refractive power, a lens having a convex toward the object side having a positive refractive power, and a biconcave lens having a negative refractive power. And a twelfth lens unit L12 that is a cemented lens composed of a lens having a convex power toward the object side having a refractive power and a lens having a convex power toward the object side having a positive refractive power. Have the power of refraction.

  The second lens unit L2 includes a cemented lens including a lens having a negative refractive power and a convex surface facing the object side, and a lens having a positive refractive power and the convex surface facing the object side. Has negative refractive power. The second lens unit L2 moves toward the image plane along the optical axis during focusing from infinity to a short distance.

  The thirty-first lens unit L31 includes a lens having a convex surface facing the object side having a positive refractive power, and has a positive refractive power as a whole.

The thirty-second lens unit L32 includes a biconvex lens having a positive refractive power, a biconcave lens having a negative refractive power, and a biconcave lens having a negative refractive power, and has a negative refractive power as a whole. .
The thirty-second lens unit L32 moves in a direction perpendicular to the optical axis during camera shake correction.

  The thirty-third lens unit L33 includes a biconvex lens having a positive refractive power, a biconvex lens having a positive refractive power, and a lens having a convex surface facing the image surface side having a negative refractive power. Have the power of refraction.

  FIG. 6 is a lens configuration diagram of the imaging optical system according to the twelfth embodiment of the present invention. The first lens unit L1 includes a biconvex lens having a positive refractive power, a lens having a convex toward the object side having a positive refractive power, and a biconcave lens having a negative refractive power. And a twelfth lens unit L12 that is a cemented lens composed of a lens having a convex power toward the object side having a refractive power and a lens having a convex power toward the object side having a positive refractive power. Have the power of refraction.

  The second lens unit L2 includes a cemented lens including a lens having a negative refractive power and a convex surface facing the object side, and a lens having a positive refractive power and the convex surface facing the object side. Has negative refractive power. The second lens unit L2 moves toward the image plane along the optical axis during focusing from infinity to a short distance.

  The thirty-first lens unit L31 includes a lens having a convex surface facing the object side having a positive refractive power, and has a positive refractive power as a whole.

The thirty-second lens unit L32 includes a biconvex lens having a positive refractive power, a biconcave lens having a negative refractive power, and a biconcave lens having a negative refractive power, and has a negative refractive power as a whole. .
The thirty-second lens unit L32 moves in a direction perpendicular to the optical axis during camera shake correction.

  The thirty-third lens unit L33 includes a biconvex lens having a positive refractive power and a lens having a convex toward the image surface side having a negative refractive power, and has a positive refractive power as a whole.

  Subsequently, specification values (numerical examples) of the inner focus type telephoto lens according to each example described above will be shown below.

  In [Surface data], the surface number is the number of the lens surface or aperture stop counted from the object side, r is the radius of curvature of each surface, d is the distance between the surfaces, nd is the refractive index with respect to the d-line (wavelength 587.56 nm). , Vd indicate Abbe numbers for the d line. BF represents back focus. Note that (surface) attached to the surface number indicates that the aperture stop is located at that position. ∞ (infinity) is entered in the radius of curvature for a plane or aperture stop.

  [Various data] shows values such as the focal length at infinity (INF).

  [Variable interval data] shows the values of the variable surface interval when the object distance is infinity (INF), when the object distance is 12000 mm (x40), and when the object distance is the shortest imaging (MOD).

  [Lens Group Data] indicates the surface number of the most object side constituting each lens group and the combined focal length of the entire group.

  In [glass material data], the refractive index ng, nF, nC for the g-line (wavelength 435.8 nm), F-line (wavelength 486.1 nm), and C-line (wavelength 656.3 nm) for the lens corresponding to the surface number, respectively. And the partial dispersion ratio θgF.

  In all the values of the following specifications, the focal length f, the radius of curvature r, the lens surface interval d, and other length units described are in millimeters (mm) unless otherwise specified. In the system, the same optical performance can be obtained even in proportional expansion and proportional reduction, and the present invention is not limited to this.

Numerical example 1
[Surface data]
Surface number rd nd vd
Object ∞ (d0)
1 114.4337 16.2797 1.43700 95.10
2 -678.6438 1.0000
3 107.4482 11.5975 1.49700 81.61
4 630.6386 4.8253
5 -2500.0000 3.5000 1.77250 49.62
6 305.7522 23.0000
7 84.5185 1.7500 1.80610 40.73
8 46.0812 13.9929 1.49700 81.61
9 239.0624 (d9)
10 595.6767 2.5000 1.56883 56.04
11 64.6046 2.7042 1.76182 26.61
12 79.5386 (d12)
13 (Aperture) ∞ 2.0000
14 144.2420 3.2500 1.49700 81.61
15 1861.2235 2.0000
16 -536.0371 2.4394 1.84666 23.78
17 -87.0916 1.2500 1.49700 81.61
18 48.0248 5.9427
19 -142.5014 2.2500 1.62041 60.34
20 83.9829 4.5000
21 109.5549 3.6685 1.49700 81.61
22 -170.8715 2.2000
23 73.6761 6.0000 1.77250 49.62
24 -113.5019 2.2592 1.84666 23.78
25 676.7340 76.1433
Image plane ∞

[Various data]
INF
Focal length 289.90
F number 2.90
Full angle of view 2ω 8.50
Statue height Y 21.63
Total lens length 189.94

[Variable interval data]
INF x40 MOD
d0 ∞ 11753.1317 1735.5051
d9 3.6193 6.3978 24.4526
d12 67.4147 64.6363 46.5815
BF 76.1433 76.1433 76.1433

[Lens group data]
Group Start surface Focal length
L1 1 152.25
L2 10 -179.60
L3 14 643.46
L11 1 172.78
L12 7 1125.86
L31 14 314.41
L32 16 -49.20
L33 21 62.90

[Glass data]
Surface number ng nF nC θgF
14 1.50451 1.50123 1.49514 0.53880
16 1.89413 1.87209 1.83649 0.61910
17 1.50451 1.50123 1.49514 0.53880
19 1.63310 1.62755 1.61727 0.53930
21 1.50451 1.50123 1.49514 0.53880
23 1.79193 1.78336 1.76780 0.55030
24 1.89413 1.87209 1.83649 0.61910

Numerical example 2
[Surface data]
Surface number rd nd vd
Object ∞ (d0)
1 105.1074 18.5902 1.43700 95.10
2 -725.6748 11.0166
3 107.7337 10.2501 1.49700 81.61
4 404.8907 6.2472
5 -775.0264 8.0000 1.77250 49.62
6 389.8974 9.4198
7 84.6027 1.7500 1.80610 40.73
8 46.1052 14.5143 1.49700 81.61
9 215.7084 (d9)
10 897.4628 2.5000 1.65844 50.86
11 50.9090 3.0000 1.84666 23.78
12 63.5533 (d12)
13 (Aperture) ∞ 2.0000
14 110.5676 4.1902 1.49700 81.61
15 -224.7599 2.3337
16 1390.7566 2.7500 1.84666 23.78
17 -95.6077 2.5000 1.49700 81.61
18 55.0601 5.5921
19 -181.9576 2.2500 1.80420 46.50
20 65.6048 4.5000
21 111.9859 3.1815 1.65844 50.86
22 -358.1760 4.0000
23 68.6437 7.0130 1.80420 46.50
24 -93.2514 2.9000 1.84666 23.78
25 407.0030 68.0577
Image plane ∞

[Various data]
INF
Focal length 289.90
F number 2.90
Full angle of view 2ω 8.50
Statue height Y 21.63
Total lens length 195.79

[Variable interval data]
INF x40 MOD
d0 ∞ 11753.1317 1737.5297
d9 27.2891 29.9808 47.4184
d12 40.0000 37.3083 19.8707
BF 68.0577 68.0577 68.0329

[Lens group data]
Group Start surface Focal length
L1 1 161.38
L2 10 -113.84
L3 14 253.63
L11 1 180.00
L12 7 1498.47
L31 14 149.74
L32 16 -45.84
L33 21 59.74

[Glass data]
Surface number ng nF nC θgF
14 1.50451 1.50123 1.49514 0.53880
16 1.89413 1.87209 1.83649 0.61910
17 1.50451 1.50123 1.49514 0.53880
19 1.82594 1.81630 1.79900 0.55790
21 1.67471 1.66749 1.65454 0.55750
23 1.82594 1.81630 1.79900 0.55790
24 1.89413 1.87209 1.83649 0.61910

Numerical example 3
[Surface data]
Surface number rd nd vd
Object ∞ (d0)
1 111.5611 16.8770 1.43700 95.10
2 -583.9630 1.0000
3 109.2461 11.7388 1.49700 81.61
4 647.8708 5.0827
5 -1327.0205 3.5000 1.77250 49.62
6 311.9153 23.0000
7 83.3946 1.7500 1.80610 40.73
8 45.7174 14.1340 1.49700 81.61
9 243.5198 (d9)
10 621.3837 2.5000 1.56883 56.04
11 63.1676 2.9249 1.76182 26.61
12 77.7817 (d12)
13 (Aperture) ∞ 2.0000
14 158.6934 3.2500 1.49700 81.61
15 -8698.6666 2.0000
16 -836.7685 2.5491 1.84666 23.78
17 -91.4929 1.2500 1.49700 81.61
18 47.1208 6.0384
19 -132.1812 2.2500 1.62041 60.34
20 85.1315 4.5000
21 111.0800 3.6486 1.49700 81.61
22 -170.5498 2.2000
23 73.7272 6.0000 1.77250 49.62
24 -109.9329 2.2628 1.84666 23.78
25 794.1278 76.0626
Image plane ∞

[Various data]
INF
Focal length 289.91
F number 2.90
Full angle of view 2ω 8.50
Statue height Y 21.63
Total lens length 189.41

[Variable interval data]
INF x40 MOD
d0 ∞ 11753.1317 1735.5051
d9 3.5872 6.3125 23.9977
d12 65.3674 62.6421 44.9570
BF 76.0626 76.0627 76.0627

[Lens group data]
Group Start surface Focal length
L1 1 151.38
L2 10 -173.93
L3 14 618.51
L11 1 173.82
L12 7 996.37
L31 14 313.62
L32 16 -49.07
L33 21 62.57

[Glass data]
Surface number ng nF nC θgF
14 1.50451 1.50123 1.49514 0.53880
16 1.89413 1.87209 1.83649 0.61910
17 1.50451 1.50123 1.49514 0.53880
19 1.63310 1.62755 1.61727 0.53930
21 1.50451 1.50123 1.49514 0.53880
23 1.79193 1.78336 1.76780 0.55030
24 1.89413 1.87209 1.83649 0.61910

Numerical example 4
[Surface data]
Surface number rd nd vd
Object ∞ (d0)
1 109.7326 17.0351 1.43700 95.10
2 -565.4174 0.5304
3 113.5237 14.7969 1.43700 95.10
4 -484.5846 1.9501
5 -386.0099 5.0000 1.72916 54.67
6 297.8818 32.9889
7 65.7803 1.7500 1.80610 40.73
8 40.2511 13.6090 1.49700 81.61
9 146.2237 (d9)
10 759.7203 2.5000 1.56883 56.04
11 54.9239 3.0000 1.80518 25.46
12 65.9305 (d12)
13 (Aperture) ∞ 2.0000
14 153.2226 3.5000 1.49700 81.61
15 -548.7770 2.0000
16 -440.8309 2.6289 1.84666 23.78
17 -84.5647 1.2500 1.49700 81.61
18 47.3914 5.9467
19 -146.5954 2.5000 1.62041 60.34
20 86.6698 4.5000
21 108.8065 4.1243 1.49700 81.61
22 -186.2548 2.2000
23 72.8059 6.5000 1.72916 54.67
24 -126.7315 2.2451 1.84666 23.78
25 1645.2119 75.5183
Image plane ∞

[Various data]
INF
Focal length 289.96
F number 2.90
Full angle of view 2ω 8.50
Statue height Y 21.63
Total lens length 188.02

[Variable interval data]
INF x40 MOD
d0 ∞ 11753.1317 1735.5051
d9 4.5101 7.0260 23.2437
d12 50.9527 48.4368 32.2192
BF 75.5183 75.5183 75.5183

[Lens group data]
Group Start surface Focal length
L1 1 149.18
L2 10 -141.87
L3 14 458.24
L11 1 180.51
L12 7 688.77
L31 14 241.41
L32 16 -49.09
L33 21 63.96

[Glass data]
Surface number ng nF nC θgF
14 1.50451 1.50123 1.49514 0.53880
16 1.89413 1.87209 1.83649 0.61910
17 1.50451 1.50123 1.49514 0.53880
19 1.63310 1.62755 1.61727 0.53930
21 1.50451 1.50123 1.49514 0.53880
23 1.74571 1.73844 1.72510 0.54520
24 1.89413 1.87209 1.83649 0.61910

Numerical example 5
[Surface data]
Surface number rd nd vd
Object ∞ (d0)
1 112.2826 16.4272 1.43700 95.10
2 -640.5347 1.2638
3 117.6459 12.4780 1.49700 81.61
4 -2937.1698 4.0454
5 -674.6109 5.0000 1.77250 49.62
6 269.6393 26.9110
7 75.4552 1.7500 1.80610 40.73
8 44.5757 13.6096 1.49700 81.61
9 200.3735 (d9)
10 626.7051 2.5000 1.56883 56.04
11 62.1116 3.0000 1.76182 26.61
12 77.2051 (d12)
13 (Aperture) ∞ 2.0000
14 149.8613 3.2500 1.49700 81.61
15 3708.4030 2.0000
16 -675.6481 2.5811 1.84666 23.78
17 -87.1878 1.2500 1.49700 81.61
18 46.6361 6.0678
19 -129.7203 2.5000 1.62041 60.34
20 88.2365 4.5000
21 124.4643 3.6576 1.49700 81.61
22 -146.0383 2.2000
23 69.5689 6.0000 1.72916 54.67
24 -122.7708 2.1725 1.84666 23.78
25 1052.7754 76.1098
Image plane ∞

[Various data]
INF
Focal length 289.96
F number 2.90
Full angle of view 2ω 8.50
Statue height Y 21.63
Total lens length 190.42

[Variable interval data]
INF x40 MOD
d0 ∞ 11753.1317 1735.5051
d9 3.9283 6.7316 24.9531
d12 61.3318 58.5284 40.3070
BF 76.1098 76.1098 76.1098

[Lens group data]
Group Start surface Focal length
L1 1 152.91
L2 10 -173.14
L3 14 600.50
L11 1 185.67
L12 7 688.69
L31 14 314.14
L32 16 -49.02
L33 21 62.58

[Glass data]
Surface number ng nF nC θgF
14 1.50451 1.50123 1.49514 0.53880
16 1.89413 1.87209 1.83649 0.61910
17 1.50451 1.50123 1.49514 0.53880
19 1.63310 1.62755 1.61727 0.53930
21 1.50451 1.50123 1.49514 0.53880
23 1.74571 1.73844 1.72510 0.54520
24 1.89413 1.87209 1.83649 0.61910

Numerical example 6
[Surface data]
Surface number rd nd vd
Object ∞ (d0)
1 110.8945 19.4881 1.43700 95.10
2 -518.9511 0.5000
3 114.1492 16.6454 1.43700 95.10
4 -453.9763 2.2108
5 -341.4076 5.2210 1.65844 50.86
6 288.2184 23.7500
7 66.7128 1.5000 1.80610 40.73
8 41.1680 14.7625 1.49700 81.61
9 155.4860 (d9)
10 3392.9376 2.5000 1.56883 56.04
11 51.7357 3.5190 1.84666 23.78
12 62.1815 (d12)
13 (Aperture) ∞ 3.3947
14 331.7156 3.5000 1.59282 68.63
15 -188.7475 2.0000
16 722.7312 2.7103 1.84666 23.78
17 -112.2519 1.2500 1.49700 81.61
18 43.1063 6.2224
19 -124.9821 2.5000 1.63854 55.45
20 83.2451 4.5000
21 100.6661 4.0948 1.49700 81.61
22 -186.8990 2.2000
23 65.3034 7.0669 1.65844 50.86
24 -89.9138 2.2693 1.84666 23.78
25 -4338.5067 73.3840
Image plane ∞

[Various data]
INF
Focal length 289.93
F number 2.88
Full angle of view 2ω 8.50
Statue height Y 21.63
Total lens length 192.16

[Variable interval data]
INF x40 MOD
d0 ∞ 11753.1317 1735.5051
d9 4.8202 6.9638 20.5997
d12 55.5322 53.3887 39.7527
BF 73.3840 73.3840 73.4090

[Lens group data]
Group Start surface Focal length
L1 1 141.65
L2 10 -126.07
L3 14 407.99
L11 1 174.29
L12 7 612.60
L31 14 203.43
L32 16 -48.50
L33 21 63.96

[Glass data]
Surface number ng nF nC θgF
14 1.60354 1.59884 1.59021 0.54410
16 1.89413 1.87209 1.83649 0.61910
17 1.50451 1.50123 1.49514 0.53880
19 1.65287 1.64657 1.63505 0.54730
21 1.50451 1.50123 1.49514 0.53880
23 1.67471 1.66749 1.65454 0.55750
24 1.89413 1.87209 1.83649 0.61910

Numerical example 7
[Surface data]
Surface number rd nd vd
Object ∞ (d0)
1 112.9316 20.3287 1.43700 95.10
2 -583.8913 0.5000
3 116.7284 17.9693 1.43700 95.10
4 -379.0426 1.9850
5 -313.8879 6.5000 1.65844 50.86
6 324.8099 22.6371
7 66.7817 2.3500 1.80610 40.73
8 41.0376 12.6211 1.49700 81.61
9 155.7972 (d9)
10 1463.2129 2.5000 1.56883 56.04
11 55.2997 2.9919 1.84666 23.78
12 66.2221 (d12)
13 (Aperture) ∞ 2.0000
14 290.4516 3.6416 1.43700 95.10
15 -189.6712 2.0000
16 1350.3432 2.8227 1.84666 23.78
17 -102.8796 1.5000 1.49700 81.61
18 41.9731 6.7077
19 -113.1764 2.5000 1.63854 55.45
20 91.6385 4.5000
21 107.6946 4.2044 1.49700 81.61
22 -152.7638 2.0000
23 66.2112 5.5657 1.65844 50.86
24 -92.7878 2.3024 1.84666 23.78
25 -1161.4453 73.4006
Image plane ∞

[Various data]
INF
Focal length 289.96
F number 2.88
Full angle of view 2ω 8.50
Statue height Y 21.63
Total lens length 191.26

[Variable interval data]
INF x40 MOD
d0 ∞ 11753.1317 2237.9929
d9 4.1260 6.3592 16.6174
d12 57.0084 54.7752 44.5170
BF 73.4006 73.4006 73.4006

[Lens group data]
Group Start surface Focal length
L1 1 141.51
L2 10 -137.83
L3 14 495.67
L11 1 174.25
L12 7 608.98
L31 14 263.18
L32 16 -47.38
L33 21 61.40

[Glass data]
Surface number ng nF nC θgF
14 1.44264 1.44019 1.43559 0.53340
16 1.89413 1.87209 1.83649 0.61910
17 1.50451 1.50123 1.49514 0.53880
19 1.65287 1.64657 1.63505 0.54730
21 1.50451 1.50123 1.49514 0.53880
23 1.67471 1.66749 1.65454 0.55750
24 1.89413 1.87209 1.83649 0.61910

Numerical example 8
[Surface data]
Surface number rd nd vd
Object ∞ (d0)
1 102.2281 18.4476 1.43700 95.10
2 -752.9426 15.5000
3 110.4760 10.7213 1.49700 81.61
4 960.5218 5.1437
5 -554.0875 3.5000 1.74330 49.22
6 232.7917 20.0000
7 73.8252 1.7500 1.80610 40.73
8 43.4479 13.0055 1.49700 81.61
9 240.8468 5.5000
10 485.2153 2.5000 1.56883 56.04
11 62.3848 2.6160 1.78472 25.72
12 74.4945 59.0403
13 (Aperture) ∞ 2.0000
14 149.6242 3.2500 1.56384 60.83
15 4010.9862 2.0000
16 -759.3410 2.7500 1.84666 23.78
17 -88.4281 1.2500 1.49700 81.61
18 51.9945 5.2824
19 -188.5417 1.8500 1.71300 53.94
20 74.1985 4.2963
21 111.1985 3.2460 1.65844 50.86
22 -317.2878 3.0000
23 71.5527 6.8539 1.80420 46.50
24 -90.3213 2.9000 1.84666 23.78
25 367.6416 72.9105
Image plane ∞

[Various data]
INF
Focal length 289.91
F number 2.90
Full angle of view 2ω 8.50
Statue height Y 21.63
Total lens length 196.40

[Variable interval data]
INF x40 MOD
d0 ∞ 11753.1317 1737.5297
d9 5.5000 8.5329 28.3176
d12 59.0403 56.0073 36.2227
BF 72.9105 72.9105 72.8849

[Lens group data]
Group Start surface Focal length
L1 1 159.35
L2 10 -171.93
L3 14 557.68
L11 1 204.13
L12 7 524.16
L31 14 275.57
L32 16 -48.37
L33 21 60.97

[Glass data]
Surface number ng nF nC θgF
14 1.57529 1.57028 1.56101 0.54070
16 1.89413 1.87209 1.83649 0.61910
17 1.50451 1.50123 1.49514 0.53880
19 1.72939 1.72220 1.70898 0.54410
21 1.67471 1.66749 1.65454 0.55750
23 1.82594 1.81630 1.79900 0.55790
24 1.89413 1.87209 1.83649 0.61910

Numerical example 9
[Surface data]
Surface number rd nd vd
Object ∞ (d0)
1 100.9142 19.2500 1.43700 95.10
2 -1131.1048 24.0000
3 89.8451 10.7855 1.49700 81.61
4 321.3374 4.8469
5 -811.0565 5.0000 1.77250 49.62
6 276.9467 9.9579
7 83.8456 2.5000 1.80610 40.73
8 43.7363 14.0674 1.49700 81.61
9 251.2537 (d9)
10 787.4073 2.5000 1.56732 42.84
11 41.6287 4.7593 1.75211 25.05
12 56.5037 (d12)
13 (Aperture) ∞ 2.0000
14 98.9701 4.0648 1.49700 81.61
15 -789.4290 2.0000
16 408.5081 3.3009 1.84666 23.78
17 -87.4438 1.5000 1.58913 61.25
18 59.3566 4.0609
19 -202.3974 1.5000 1.72916 54.67
20 68.8430 3.1416
21 131.0205 2.7594 1.71300 53.94
22 -353.0185 0.1000
23 63.0038 5.1750 1.80420 46.50
24 -97.5414 1.5000 1.84666 23.78
25 212.3831 80.4769
Image plane ∞

[Various data]
INF
Focal length 289.91
F number 2.90
Full angle of view 2ω 8.50
Statue height Y 21.63
Total lens length 191.65

[Variable interval data]
INF x40 MOD
d0 ∞ 11753.1317 1737.5297
d9 9.7245 12.4674 30.1960
d12 53.1607 50.4177 32.6891
BF 80.4769 80.4769 80.4769

[Lens group data]
Group Start surface Focal length
L1 1 163.83
L2 10 -125.71
L3 14 290.12
L11 1 183.32
L12 7 1354.95
L31 14 177.22
L32 16 -51.91
L33 21 62.40

[Glass data]
Surface number ng nF nC θgF
14 1.5045 1.5012 1.4951 0.5388
16 1.8941 1.8721 1.8365 0.6191
17 1.6010 1.5958 1.5862 0.5403
19 1.7457 1.7384 1.7251 0.5452
21 1.7294 1.7222 1.7090 0.5441
23 1.8259 1.8163 1.7990 0.5579
24 1.8941 1.8721 1.8365 0.6191

Numerical example 10
[Surface data]
Surface number rd nd vd
Object ∞ (d0)
1 98.2513 18.6060 1.43700 95.10
2 -1551.9516 30.0000
3 99.2219 10.3260 1.49700 81.61
4 558.8124 4.2566
5 -484.9301 5.0000 1.80420 46.50
6 304.8517 3.0000
7 81.3361 2.5000 1.80610 40.73
8 44.9941 14.5239 1.49700 81.61
9 267.7429 (d9)
10 635.8303 2.5000 1.51742 52.15
11 57.7366 3.2760 1.75211 25.05
12 69.6604 (d12)
13 (Aperture) ∞ 10.2003
14 159.8814 3.3169 1.65844 50.86
15 -926.4624 2.0000
16 253.7652 3.3009 1.84666 23.78
17 -83.8408 1.5000 1.58913 61.25
18 54.7808 2.9929
19 -158.2557 1.5000 1.72916 54.67
20 58.3928 5.1339
21 92.7035 3.0870 1.62041 60.34
22 -388.6143 5.2500
23 65.9173 5.8295 1.72916 54.67
24 -79.8693 2.0541 1.80518 25.46
25 361.3757 68.8350
Image plane ∞

[Various data]
INF
Focal length 289.97
F number 2.90
Full angle of view 2ω 8.50
Statue height Y 21.63
Total lens length 197.62

[Variable interval data]
INF x40 MOD
d0 ∞ 11753.1317 1737.5297
d9 9.5876 12.7894 33.8576
d12 47.8814 44.6797 23.6115
BF 68.8350 68.8350 68.8350

[Lens group data]
Group Start surface Focal length
L1 1 162.60
L2 10 -172.09
L3 14 584.71
L11 1 196.79
L12 7 734.87
L31 14 207.34
L32 16 -46.65
L33 21 62.68

[Glass data]
Surface number ng nF nC θgF
14 1.67471 1.66749 1.65454 0.55750
16 1.89413 1.87209 1.83649 0.61910
17 1.60100 1.59581 1.58619 0.54030
19 1.74571 1.73844 1.72510 0.54520
21 1.63310 1.62755 1.61727 0.53930
23 1.74571 1.73844 1.72510 0.54520
24 1.84721 1.82774 1.79611 0.61560

Numerical Example 11
[Surface data]
Surface number rd nd vd
Object ∞ (d0)
1 118.9265 18.7111 1.43700 95.10
2 -539.3913 0.5000
3 110.1534 16.1053 1.43700 95.10
4 -861.8256 2.2840
5 -519.3613 6.0000 1.80420 46.50
6 462.6370 31.7557
7 63.5687 2.3500 1.83400 37.34
8 40.0731 12.4253 1.49700 81.61
9 150.9584 (d9)
10 401.3307 2.5000 1.80610 40.73
11 46.8418 5.0128 1.75211 25.05
12 85.5207 (d12)
13 (Aperture) ∞ 10.7971
14 171.4679 3.5015 1.72916 54.67
15 377.2390 2.0000
16 326.0953 2.8271 1.84666 23.78
17 -102.6585 1.5000 1.49700 81.61
18 41.6145 3.6900
19 -89.6894 1.5000 1.77250 49.62
20 114.0774 8.7024
21 166.3323 3.7399 1.49700 81.61
22 -111.1920 10.2500
23 87.8574 6.0323 1.71300 53.94
24 -67.5100 2.2851 1.80518 25.46
25 -254.5225 72.3600
Image plane ∞

[Various data]
INF
Focal length 289.99
F number 2.91
Full angle of view 2ω 8.50
Statue height Y 21.63
Total lens length 190.38

[Variable interval data]
INF x40 MOD
d0 ∞ 11753.1317 1737.5297
d9 5.6929 7.8849 21.8875
d12 30.2186 28.0266 14.0240
BF 72.3600 72.3602 72.3601

[Lens group data]
Group Start surface Focal length
L1 1 137.32
L2 10 -126.75
L3 14 329.10
L11 1 168.42
L12 7 572.42
L31 14 428.04
L32 16 -46.55
L33 21 61.12

[Glass data]
Surface number ng nF nC θgF
14 1.74571 1.73844 1.72510 0.54520
16 1.89413 1.87209 1.83649 0.61910
17 1.50451 1.50123 1.49514 0.53880
19 1.79193 1.78336 1.76780 0.55030
21 1.50451 1.50123 1.49514 0.53880
23 1.72939 1.72220 1.70898 0.54410
24 1.84721 1.82774 1.79611 0.61560

Numerical Example 12
[Surface data]
Surface number rd nd vd
Object ∞ (d0)
1 108.6022 19.2500 1.43700 95.10
2 -1104.1233 0.5000
3 128.2080 16.1600 1.43700 95.10
4 -429.3762 1.7939
5 -374.1061 9.6600 1.72916 54.67
6 354.7052 15.9812
7 73.3992 2.3500 1.80610 40.73
8 44.2498 15.6618 1.49700 81.61
9 181.9009 24.6125
10 1049.6300 2.5000 1.51680 64.20
11 52.0246 2.8150 1.84666 23.78
12 58.4516 28.2906
13 (Aperture) ∞ 2.0000
14 119.2411 3.4704 1.72916 54.67
15 955.1243 2.0000
16 170.2515 3.7170 1.84666 23.78
17 -84.2893 1.5000 1.77250 49.62
18 53.2924 3.1910
19 -170.7031 1.5000 1.78590 43.93
20 121.1350 16.4716
21 84.9342 6.1058 1.77250 49.62
22 -46.1729 1.2000
23 -43.6945 2.2688 2.00069 25.46
24 -96.4743 79.9059
Image plane ∞

[Various data]
INF
Focal length 289.98
F number 2.88
Full angle of view 2ω 8.50
Statue height Y 21.63
Total lens length 183.00

[Variable interval data]
INF x40 MOD
d0 ∞ 11753.1317 2237.9929
d9 24.6125 27.3636 40.2141
d12 28.2906 25.5395 12.6890
BF 79.9059 79.9059 79.9058

[Lens group data]
Group Start surface Focal length
L1 1 153.74
L2 10 -133.43
L3 14 356.79
L11 1 192.62
L12 7 657.59
L31 14 186.53
L32 16 -50.68
L33 21 74.07

[Glass data]
Surface number ng nF nC θgF
14 1.74571 1.73844 1.72510 0.54520
16 1.89413 1.87209 1.83649 0.61910
17 1.79193 1.78336 1.76780 0.55030
19 1.80846 1.79842 1.78053 0.56110
21 1.79193 1.78336 1.76780 0.55030
23 2.05283 2.02872 1.98941 0.61350

  In addition, a list of corresponding values of the conditional expressions in each of these examples is shown below.

[Values for conditional expressions]
1 2 3 4
(1) 0.45 <f1 / f <0.60 0.53 0.56 0.52 0.51
(2) 0.35 <| f2 | / f <0.65 0.62 0.39 0.60 0.49
(3) 0.60 <f3 / f <3.00 2.22 0.87 2.13 1.58
(4) 0.50 <f31 / f <1.50 1.08 0.52 1.08 0.83
(5) 0.15 <| f32 | / f <0.20 0.17 0.16 0.17 0.17
(6) 0.15 <f33 / f <0.30 0.22 0.21 0.22 0.22
(7) −0.90 <SF1 <−0.64 -0.71 -0.75 -0.68 -0.67
(8) −1.8 <SF2 <−0.53 -1.41 -1.73 -1.41 -0.62
(9) −0.10 <SF3 <0.80 0.78 0.33 0.62 0.13
(10) 3.10 <SF4 <4.50 3.40 3.40 3.43 4.15
(11) −1.80 <SF5 <−1.35 -1.48 -1.54 -1.46 -1.76

5 6 7 8
(1) 0.45 <f1 / f <0.60 0.53 0.49 0.49 0.55
(2) 0.35 <| f2 | / f <0.65 0.60 0.43 0.48 0.59
(3) 0.60 <f3 / f <3.00 2.07 1.41 1.71 1.92
(4) 0.50 <f31 / f <1.50 1.08 0.70 0.91 0.95
(5) 0.15 <| f32 | / f <0.20 0.17 0.17 0.16 0.17
(6) 0.15 <f33 / f <0.30 0.22 0.22 0.21 0.21
(7) −0.90 <SF1 <−0.64 -0.70 -0.65 -0.68 -0.76
(8) −1.8 <SF2 <−0.53 -0.92 -0.60 -0.53 -1.26
(9) −0.10 <SF3 <0.80 0.43 0.08 -0.02 0.41
(10) 3.10 <SF4 <4.50 3.89 4.22 4.19 3.86
(11) −1.80 <SF5 <−1.35 -1.57 -1.72 -1.72 -1.44

9 10 11 12
(1) 0.45 <f1 / f <0.60 0.57 0.56 0.47 0.53
(2) 0.35 <| f2 | / f <0.65 0.43 0.59 0.44 0.46
(3) 0.60 <f3 / f <3.00 1.00 2.02 1.13 1.23
(4) 0.50 <f31 / f <1.50 0.61 0.72 1.48 0.64
(5) 0.15 <| f32 | / f <0.20 0.18 0.16 0.16 0.17
(6) 0.15 <f33 / f <0.30 0.22 0.22 0.21 0.26
(7) −0.90 <SF1 <−0.64 -0.84 -0.88 -0.64 -0.82
(8) −1.8 <SF2 <−0.53 -1.78 -1.43 -0.77 -0.54
(9) −0.10 <SF3 <0.80 0.49 0.23 0.06 0.03
(10) 3.10 <SF4 <4.50 3.18 3.48 4.41 4.04
(11) −1.80 <SF5 <−1.35 -1.42 -1.40 -1.72 -1.64

L1 1st lens group L11 11th lens group L12 12th lens group L2 2nd lens group L3 3rd lens group L31 31st lens group L32 32nd lens group L33 33rd lens group S Aperture stop I Image surface

Claims (3)

In order from the object side to the image surface side, the first lens unit L1 has a positive refractive power, the second lens unit L2 has a negative refractive power, and the third lens unit L3 has a positive refractive power.
The first lens unit L1 includes an eleventh lens unit L11 and a twelfth lens unit L12.
The eleventh lens unit L11 includes a positive lens having a convex surface facing the object side, a positive lens having a convex surface facing the object side, and a biconcave lens.
The twelfth lens unit L12 is a cemented lens of a concave lens having a convex surface facing the object side and a positive lens having a convex surface facing the object side,
The second lens unit L2 moves in the optical axis direction during focusing,
The third lens unit L3 includes a thirty-first lens unit L31 having a positive refractive power, a thirty-second lens unit L32 having a negative refractive power, and a thirty-third lens unit L33 having a positive refractive power, The thirty-second lens unit L32 moves in a direction perpendicular to the optical axis during image stabilization, and satisfies the following conditional expressions (1) to (6).
(1) 0.45 <f1 / f <0.60
(2) 0.35 <| f2 | / f <0.65
(3) 0.60 <f3 / f <3.00
(4) 0.50 <f31 / f <1.50
(5) 0.15 <| f32 | / f <0.20
(6) 0.15 <f33 / f <0.30
fi: focal length of the i-th lens group f: focal length of the entire imaging optical system 2. The imaging optical system according to claim 1, further satisfying conditional expressions (7) to (9) shown below.
(7) −0.90 <SF1 <−0.64
(8) -1.80 <SF2 <-0.53
(9) -0.10 <SF3 <0.80
SF1: Form factor SF1 of the first lens G1 which is the most object side lens of the eleventh lens group L11 SF2: Shape factor SF2 of the second lens G2 which is the second lens from the object side of the eleventh lens group L11 Form factor SFn of the third lens G3, which is the third lens from the object side of the lens unit L11: When the curvature radius on the object side of the nth lens from the object side is R1n and the curvature radius on the image side is R2n
SFn = (R1n + R2n) / (R1n-R2n)
Form factor represented by 3. The imaging optical system according to claim 1, wherein the imaging optical system further satisfies the following conditional expressions (10) and (11): 4.
(10) 3.10 <SF4 <4.50
(11) -1.80 <SF5 <-1.35
SF4: Form factor of the fourth lens G4 which is the most object side lens of the twelfth lens group L12 SF5: Shape factor of the fifth lens G5 which is the second lens from the object side of the twelfth lens group L12

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