GB2090005B - Improvements in or relating to automatic exposure controllers for cameras of ttl direct photometry type - Google Patents

Improvements in or relating to automatic exposure controllers for cameras of ttl direct photometry type

Info

Publication number
GB2090005B
GB2090005B GB8136580A GB8136580A GB2090005B GB 2090005 B GB2090005 B GB 2090005B GB 8136580 A GB8136580 A GB 8136580A GB 8136580 A GB8136580 A GB 8136580A GB 2090005 B GB2090005 B GB 2090005B
Authority
GB
United Kingdom
Prior art keywords
cameras
relating
automatic exposure
direct photometry
ttl direct
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.)
Expired
Application number
GB8136580A
Other languages
English (en)
Other versions
GB2090005A (en
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.)
Olympus Corp
Original Assignee
Olympus Optical Co Ltd
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
Priority claimed from JP17245280A external-priority patent/JPS5796318A/ja
Priority claimed from JP56025759A external-priority patent/JPS57139723A/ja
Application filed by Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Publication of GB2090005A publication Critical patent/GB2090005A/en
Application granted granted Critical
Publication of GB2090005B publication Critical patent/GB2090005B/en
Expired 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
    • G03B7/081—Analogue circuits
    • G03B7/083—Analogue circuits for control of exposure time
    • 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
    • G03B7/09971—Through the lens [TTL] measuring in mirror-reflex cameras
    • G03B7/09974—Through the lens [TTL] measuring in mirror-reflex cameras using the film or shutter as sensor light reflecting member

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Exposure Control For Cameras (AREA)
GB8136580A 1980-12-05 1981-12-04 Improvements in or relating to automatic exposure controllers for cameras of ttl direct photometry type Expired GB2090005B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP17245280A JPS5796318A (en) 1980-12-05 1980-12-05 Automatic exposure control device of ttl direct photometric camera
JP56025759A JPS57139723A (en) 1981-02-23 1981-02-23 Automatic exposure controller of ttl direct measurement camera

Publications (2)

Publication Number Publication Date
GB2090005A GB2090005A (en) 1982-06-30
GB2090005B true GB2090005B (en) 1984-03-21

Family

ID=26363448

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8136580A Expired GB2090005B (en) 1980-12-05 1981-12-04 Improvements in or relating to automatic exposure controllers for cameras of ttl direct photometry type

Country Status (4)

Country Link
US (1) US4408852A (enExample)
DE (1) DE3148071C2 (enExample)
FR (1) FR2495790A1 (enExample)
GB (1) GB2090005B (enExample)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4390258A (en) * 1980-12-15 1983-06-28 Olympus Optical Co. Ltd. Photomeric circuit for camera
US4473744A (en) * 1981-12-29 1984-09-25 Olympus Optical Company, Ltd. Photometric apparatus for camera
JPS6064580A (ja) * 1983-09-19 1985-04-13 Asahi Seimitsu Kk Ｃｃｔｖカメラ用レンズの自動絞り制御装置
JPS6069967A (ja) * 1983-09-26 1985-04-20 Asahi Seimitsu Kk Ｃｃｔｖカメラ用レンズの自動絞り制御装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5127382A (enExample) * 1974-07-02 1976-03-06 Olympus Optical Co
JPS5219525A (en) * 1975-08-06 1977-02-14 Minolta Camera Co Ltd Ttl light measure circuit for the camera
DE2810907A1 (de) * 1978-03-14 1979-09-27 Rollei Werke Franke Heidecke Fotografische kamera mit einer belichtungszeitautomatik
US4325615A (en) * 1978-08-09 1982-04-20 Minolta Camera Kabushiki Kaisha Exposure control system for single lens reflex cameras
JPS55120015A (en) * 1979-03-09 1980-09-16 Olympus Optical Co Ltd Reflection photometric device for focal plane shutter
JPS5697326A (en) * 1979-12-31 1981-08-06 Minolta Camera Co Ltd Exposure time control device of camera

Also Published As

Publication number Publication date
DE3148071C2 (de) 1984-06-20
FR2495790A1 (fr) 1982-06-11
DE3148071A1 (de) 1982-06-16
GB2090005A (en) 1982-06-30
US4408852A (en) 1983-10-11
FR2495790B1 (enExample) 1985-04-12

Similar Documents

Publication Publication Date Title
JPS57129427A (en) Photographic camera
PT75253A (en) Automatic focusing camera
GB2090422B (en) Photographic exposure control system
GB2084750B (en) Automatic camera
GB8502949D0 (en) Automatic exposure camera
JPS5521088A (en) Automatic camera focus adjuster
GB2084335B (en) Automatic exposure
GB2105029B (en) Automatic lens meter
GB2080557B (en) Inhibiting operation of camera in absence of lens
GB2079479B (en) Photographic camera
DE3169883D1 (en) Water based photosensitive composition
GB2119529B (en) Automatic focus camera
GB2084348B (en) Automatic determination of exposure
GB2090005B (en) Improvements in or relating to automatic exposure controllers for cameras of ttl direct photometry type
JPS54158923A (en) Exposure amount control system for electronic flashing mode of camera
GB2128050B (en) Arrangement for automatic focusing of photographic cameras
JPS545724A (en) Changeeover lens type ttl automatic exposure camera
GB2088073B (en) Automatic exposure control using flash
GB2122366B (en) Automatic liquid-crystal light shutter
JPS5713433A (en) Photographic camera
GB8404917D0 (en) Exposure control in single lens camera
GB2084336B (en) Camera exposure metering
GB2158600B (en) Improvements in or relating to exposure control devices for cameras
DE3165202D1 (en) Automatic focusing camera
GB2090006B (en) Photographic exposure control responsive to scene light during and before exposure

Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee