JPS5480125A - Exposure control circuit - Google Patents

Exposure control circuit

Info

Publication number
JPS5480125A
JPS5480125A JP14759977A JP14759977A JPS5480125A JP S5480125 A JPS5480125 A JP S5480125A JP 14759977 A JP14759977 A JP 14759977A JP 14759977 A JP14759977 A JP 14759977A JP S5480125 A JPS5480125 A JP S5480125A
Authority
JP
Japan
Prior art keywords
diaphragm
control
precision
shutter
amount
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.)
Pending
Application number
JP14759977A
Other languages
English (en)
Inventor
Nobuhiko Shinoda
Nobuaki Sakurada
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP14759977A priority Critical patent/JPS5480125A/ja
Priority to DE19782852586 priority patent/DE2852586A1/de
Publication of JPS5480125A publication Critical patent/JPS5480125A/ja
Priority to US06/154,537 priority patent/US4383749A/en
Pending 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
JP14759977A 1977-12-08 1977-12-08 Exposure control circuit Pending JPS5480125A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP14759977A JPS5480125A (en) 1977-12-08 1977-12-08 Exposure control circuit
DE19782852586 DE2852586A1 (de) 1977-12-08 1978-12-05 Automatische belichtungssteuervorrichtung
US06/154,537 US4383749A (en) 1977-12-08 1980-05-30 Automatic exposure control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14759977A JPS5480125A (en) 1977-12-08 1977-12-08 Exposure control circuit

Publications (1)

Publication Number Publication Date
JPS5480125A true JPS5480125A (en) 1979-06-26

Family

ID=15433976

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14759977A Pending JPS5480125A (en) 1977-12-08 1977-12-08 Exposure control circuit

Country Status (3)

Country Link
US (1) US4383749A (ja)
JP (1) JPS5480125A (ja)
DE (1) DE2852586A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62255923A (ja) * 1986-04-30 1987-11-07 Canon Inc 撮像装置

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4511234A (en) * 1981-10-02 1985-04-16 Texas Instruments Incorporated Gain switching amplifier
JPS60149032A (ja) * 1984-01-13 1985-08-06 Olympus Optical Co Ltd 絞り値自動制御式カメラ
DE3426588A1 (de) * 1984-07-19 1986-01-30 Ernst Leitz Wetzlar Gmbh, 6330 Wetzlar Verfahren zur temperaturkompensation bei der belichtungsmessung und schaltungsanordnung zur durchfuehrung des verfahrens
US4668069A (en) * 1985-05-13 1987-05-26 Nippon Kogaku K. K. Exposure control device in a camera
JP3477309B2 (ja) * 1996-03-29 2003-12-10 セイコープレシジョン株式会社 秒時優先可能なカメラ
US20090263015A1 (en) * 2008-04-17 2009-10-22 Guoyi Fu Method And Apparatus For Correcting Underexposed Digital Images

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3995284A (en) * 1972-12-29 1976-11-30 Minolta Camera Kabushiki Kaisha Automatic exposure time control circuit
DE2319167C3 (de) * 1973-04-16 1986-05-28 Ernst Leitz Wetzlar Gmbh, 6330 Wetzlar Belichtungssteuervorrichtung für fotografische Kameras
US4054887A (en) * 1973-04-16 1977-10-18 Ernest Leitz Gmbh Exposure control device for photographic cameras
JPS618414B2 (ja) * 1973-07-17 1986-03-14 Minolta Camera Kk
US4090208A (en) * 1973-12-11 1978-05-16 Canon Kabushiki Kaisha Electronic exposure control apparatus for cameras
JPS5126031A (en) * 1974-08-27 1976-03-03 Canon Kk Jikanseigyosochi
JPS60605B2 (ja) * 1975-04-23 1985-01-09 キヤノン株式会社 カメラのデジタル制御装置
US4079387A (en) * 1975-05-27 1978-03-14 Canon Kabushiki Kaisha Counter circuit for a camera
JPS5256532A (en) * 1975-11-04 1977-05-10 Canon Inc Iris information setting device for camera

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62255923A (ja) * 1986-04-30 1987-11-07 Canon Inc 撮像装置

Also Published As

Publication number Publication date
DE2852586A1 (de) 1979-06-13
DE2852586C2 (ja) 1987-02-05
US4383749A (en) 1983-05-17

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