JPS5742028A - Corrector of multiphotometric device - Google Patents

Corrector of multiphotometric device

Info

Publication number
JPS5742028A
JPS5742028A JP55118922A JP11892280A JPS5742028A JP S5742028 A JPS5742028 A JP S5742028A JP 55118922 A JP55118922 A JP 55118922A JP 11892280 A JP11892280 A JP 11892280A JP S5742028 A JPS5742028 A JP S5742028A
Authority
JP
Japan
Prior art keywords
aperture
multiphotometric
correction
value
circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP55118922A
Other languages
Japanese (ja)
Other versions
JPH0140334B2 (en
Inventor
Takashi Saegusa
Toru Fukuhara
Koichi Azuma
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NIPPON KOUGAKU KOGYO KK
Nikon Corp
Nippon Chemical Industrial Co Ltd
Original Assignee
NIPPON KOUGAKU KOGYO KK
Nippon Chemical Industrial Co Ltd
Nippon Kogaku KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NIPPON KOUGAKU KOGYO KK, Nippon Chemical Industrial Co Ltd, Nippon Kogaku KK filed Critical NIPPON KOUGAKU KOGYO KK
Priority to JP55118922A priority Critical patent/JPS5742028A/en
Priority to US06/208,039 priority patent/US4306787A/en
Priority to DE19803043989 priority patent/DE3043989A1/en
Publication of JPS5742028A publication Critical patent/JPS5742028A/en
Priority to US06/562,822 priority patent/USRE32376E/en
Publication of JPH0140334B2 publication Critical patent/JPH0140334B2/ja
Granted legal-status Critical Current

Links

Classifications

    • 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
    • G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
    • G03B7/08—Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device
    • G03B7/091—Digital circuits
    • G03B7/095—Digital circuits for control of aperture
    • 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
    • G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
    • G03B7/08—Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device
    • G03B7/099—Arrangement of photoelectric elements in or on the camera
    • G03B7/0993—Arrangement of photoelectric elements in or on the camera in the camera
    • G03B7/0997—Through the lens [TTL] measuring
    • G03B7/09979—Multi-zone light measuring

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Exposure Control For Cameras (AREA)

Abstract

PURPOSE:To approximate the results of multiphotometric treatment to a correct exposure value through proper correction by correcting multiphotometric outputs by the correction values meeting the signals and the like corresponding to the aperture value to be controlled from an exposure operating circuit. CONSTITUTION:The aperture control signal corresponding to the aperture value to be controlled from an exposure operating circuit 3, the full aperture diameter information from an information setting part 5, and the signal corresponding to the characteristics occuring in a lens optical system are inputted to a correction value calculating circuit 8. Based on these sets of input information, the circuit 8 calculates the correction value for each of the areas of the multiphotometry and the respective multiphotometric outputs are corrected by the respective adders 711... of a correction operation circuit 7. Hence, the multiphotometric errors are lessened by the proper correction meeting lens characteristics and aperture values and the detection and correction of the case in which the aperture is controlled to full aperture accomplished dispite stopping down of the aperture down to a minimum aperture in a shutter priority or program mode. As a result, the results of the multiphotometric processing are approximated more to a correct exposure value.
JP55118922A 1979-11-22 1980-08-28 Corrector of multiphotometric device Granted JPS5742028A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP55118922A JPS5742028A (en) 1980-08-28 1980-08-28 Corrector of multiphotometric device
US06/208,039 US4306787A (en) 1979-11-22 1980-11-18 Exposure control apparatus for camera provided with multi metering device
DE19803043989 DE3043989A1 (en) 1979-11-22 1980-11-21 DEVICE FOR CONTROLLING THE EXPOSURE FOR A CAMERA PROVIDED WITH A MULTIPLE MEASURING DEVICE
US06/562,822 USRE32376E (en) 1979-11-22 1983-12-19 Exposure control apparatus for camera provided with multi metering device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55118922A JPS5742028A (en) 1980-08-28 1980-08-28 Corrector of multiphotometric device

Publications (2)

Publication Number Publication Date
JPS5742028A true JPS5742028A (en) 1982-03-09
JPH0140334B2 JPH0140334B2 (en) 1989-08-28

Family

ID=14748501

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55118922A Granted JPS5742028A (en) 1979-11-22 1980-08-28 Corrector of multiphotometric device

Country Status (1)

Country Link
JP (1) JPS5742028A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58160946A (en) * 1982-03-19 1983-09-24 Hitachi Medical Corp Automatic x-ray exposing device
JPS6032032A (en) * 1983-08-02 1985-02-19 Nippon Kogaku Kk <Nikon> Camera

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4998228A (en) * 1973-01-22 1974-09-17
JPS5192622A (en) * 1975-02-12 1976-08-13
JPS5212828A (en) * 1975-07-21 1977-01-31 Konishiroku Photo Ind Co Ltd Exposure control process for the object of a non-uniform distribution of brightness

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4998228A (en) * 1973-01-22 1974-09-17
JPS5192622A (en) * 1975-02-12 1976-08-13
JPS5212828A (en) * 1975-07-21 1977-01-31 Konishiroku Photo Ind Co Ltd Exposure control process for the object of a non-uniform distribution of brightness

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58160946A (en) * 1982-03-19 1983-09-24 Hitachi Medical Corp Automatic x-ray exposing device
JPS6032032A (en) * 1983-08-02 1985-02-19 Nippon Kogaku Kk <Nikon> Camera

Also Published As

Publication number Publication date
JPH0140334B2 (en) 1989-08-28

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