JPS5433721A - Calculating device for exposureetime and irissopening in photographic device - Google Patents

Calculating device for exposureetime and irissopening in photographic device

Info

Publication number
JPS5433721A
JPS5433721A JP5219778A JP5219778A JPS5433721A JP S5433721 A JPS5433721 A JP S5433721A JP 5219778 A JP5219778 A JP 5219778A JP 5219778 A JP5219778 A JP 5219778A JP S5433721 A JPS5433721 A JP S5433721A
Authority
JP
Japan
Prior art keywords
irissopening
exposureetime
calculating
photographic
photographic device
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
JP5219778A
Other languages
English (en)
Inventor
Maaseru Ooban Jiin
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.)
Optigon Research and Development Corp
Original Assignee
Optigon Research and Development Corp
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 Optigon Research and Development Corp filed Critical Optigon Research and Development Corp
Publication of JPS5433721A publication Critical patent/JPS5433721A/ja
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
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/18—Signals indicating condition of a camera member or suitability of light
    • G03B17/20—Signals indicating condition of a camera member or suitability of light visible in viewfinder
    • 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
    • G03B7/091—Digital circuits
    • G03B7/097—Digital circuits for control of both exposure time and aperture

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Exposure Control For Cameras (AREA)
  • Indication In Cameras, And Counting Of Exposures (AREA)
JP5219778A 1975-07-21 1978-04-28 Calculating device for exposureetime and irissopening in photographic device Pending JPS5433721A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/597,479 US4192586A (en) 1975-07-21 1975-07-21 Electronic system for photographic devices

Publications (1)

Publication Number Publication Date
JPS5433721A true JPS5433721A (en) 1979-03-12

Family

ID=24391687

Family Applications (2)

Application Number Title Priority Date Filing Date
JP5519476A Pending JPS5213332A (en) 1975-07-21 1976-05-13 Electronic camera system
JP5219778A Pending JPS5433721A (en) 1975-07-21 1978-04-28 Calculating device for exposureetime and irissopening in photographic device

Family Applications Before (1)

Application Number Title Priority Date Filing Date
JP5519476A Pending JPS5213332A (en) 1975-07-21 1976-05-13 Electronic camera system

Country Status (4)

Country Link
US (1) US4192586A (ja)
JP (2) JPS5213332A (ja)
DE (1) DE2620405A1 (ja)
GB (1) GB1549442A (ja)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6010569B2 (ja) * 1977-10-08 1985-03-18 オリンパス光学工業株式会社 写真撮影装置の測光回路
JPS5640816A (en) * 1979-09-11 1981-04-17 Nippon Kogaku Kk <Nikon> Interchangeable lens
US4333722A (en) * 1980-12-22 1982-06-08 Eastman Kodak Company Method of controlling electromagnetic actuator in a camera, and actuator controllable thereby
JPH03252645A (ja) * 1990-03-02 1991-11-11 Asahi Optical Co Ltd カメラのファインダー内表示装置

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3852778A (en) * 1969-12-19 1974-12-03 Canon Kk Single lens reflex camera of ttl photometry type
JPS4837605B1 (ja) * 1970-04-14 1973-11-12
US3818495A (en) * 1972-02-28 1974-06-18 Fuji Photo Optical Co Ltd Exposure value indicating means for photographic camera
JPS5331803Y2 (ja) * 1972-07-10 1978-08-08
JPS5312595Y2 (ja) * 1972-08-31 1978-04-05
AT335198B (de) * 1972-12-01 1977-02-25 Reichert Optische Werke Ag Einrichtung zur bestimmung der belichtungszeit fur ein photographisches aufnahmegerat
JPS5640811B2 (ja) * 1972-12-29 1981-09-24
JPS5833537B2 (ja) * 1973-01-29 1983-07-20 株式会社リコー 一眼レフレツクスカメラの測光情報表示装置
FR2216598B1 (ja) * 1973-02-06 1976-06-25 Canon Kk
JPS6226021B2 (ja) * 1973-07-28 1987-06-05 Oki Denki Kogyo Kk
JPS5062430A (ja) * 1973-10-02 1975-05-28

Also Published As

Publication number Publication date
US4192586A (en) 1980-03-11
JPS5213332A (en) 1977-02-01
DE2620405A1 (de) 1977-02-10
GB1549442A (en) 1979-08-08

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