GB1309801A - Cameras having automatic shutter electronic exposure control means - Google Patents

Cameras having automatic shutter electronic exposure control means

Info

Publication number
GB1309801A
GB1309801A GB1412270A GB1412270A GB1309801A GB 1309801 A GB1309801 A GB 1309801A GB 1412270 A GB1412270 A GB 1412270A GB 1412270 A GB1412270 A GB 1412270A GB 1309801 A GB1309801 A GB 1309801A
Authority
GB
United Kingdom
Prior art keywords
resistor
photo
transistor
release
diaphragm
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
GB1412270A
Other languages
English (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.)
Agfa Gevaert AG
Original Assignee
Agfa Gevaert AG
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 DE19691914945 external-priority patent/DE1914945C3/de
Application filed by Agfa Gevaert AG filed Critical Agfa Gevaert AG
Publication of GB1309801A publication Critical patent/GB1309801A/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
    • G03B7/085—Analogue 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
    • G03B7/081—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
    • G03B7/081—Analogue circuits
    • G03B7/087—Analogue circuits for control of both exposure time and aperture

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Exposure Control For Cameras (AREA)
  • Diaphragms For Cameras (AREA)
GB1412270A 1969-03-24 1970-03-24 Cameras having automatic shutter electronic exposure control means Expired GB1309801A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691914945 DE1914945C3 (de) 1969-03-24 Meßwerklose gleichstromgespeiste automatische Belichtungssteuereinrichtung

Publications (1)

Publication Number Publication Date
GB1309801A true GB1309801A (en) 1973-03-14

Family

ID=5729139

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1412270A Expired GB1309801A (en) 1969-03-24 1970-03-24 Cameras having automatic shutter electronic exposure control means

Country Status (3)

Country Link
US (1) US3641888A (cg-RX-API-DMAC7.html)
FR (1) FR2037880A5 (cg-RX-API-DMAC7.html)
GB (1) GB1309801A (cg-RX-API-DMAC7.html)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5406348A (en) * 1993-11-24 1995-04-11 Eastman Kodak Company Camera control/autofocusing system
EP1571487A2 (en) * 2001-06-12 2005-09-07 Fuji Photo Film Co., Ltd. Camera and shutter device

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1231546B (de) * 1964-08-27 1966-12-29 Agfa Gevaert Ag Fotografische Kamera mit einer Belichtungssteuereinrichtung
DE1276437B (de) * 1965-02-09 1968-08-29 Agfa Gevaert Ag Messwerksloser automatischer Verschluss fuer eine fotografische Kamera
DE1472635A1 (de) * 1965-03-26 1969-07-10 Gossen & Co Gmbh P Schaltungsanordnung fuer elektronische Verschluesse
DE1497892A1 (de) * 1966-02-04 1969-06-12 Agfa Gevaert Ag Fotografische Kamera mit einer Belichtungssteuervorrichtung
DE1497894A1 (de) * 1966-02-09 1969-07-03 Agfa Gevaert Ag Fotografische Kamera mit einem lichtgesteuerten Verzoegerungsschaltkreis
US3464332A (en) * 1966-05-12 1969-09-02 Polaroid Corp Automatic exposure control system

Also Published As

Publication number Publication date
US3641888A (en) 1972-02-15
FR2037880A5 (cg-RX-API-DMAC7.html) 1970-12-31
DE1914945A1 (de) 1970-10-08
DE1914945B2 (de) 1975-08-28

Similar Documents

Publication Publication Date Title
US3502010A (en) Dual purpose circuit arrangement for camera shutter control and light intensity indication
US3270650A (en) Automatic exposure control system
US3502011A (en) Photographic cameras with an exposure indicating circuit
US3455218A (en) Level sensing automatic exposure control for daylight and flash
US3205802A (en) Photographic camera and accessory
US3422738A (en) Automatic exposure flash camera
US3250193A (en) Automatic flash exposure at low light level illumination
GB1309801A (en) Cameras having automatic shutter electronic exposure control means
GB1092669A (en) Photographic diaphragm and shutter assembly and camera comprising the same
GB1194393A (en) Improvements in and relating to Photographic Cameras
US3696721A (en) Automatic distance warning circuits for cameras to be used with photoflash units
US3921184A (en) Compensation of response sluggishness of photoelements employed in automatic exposure timers
US3581634A (en) Photographic camera with an electronic shutter speed control
US3665826A (en) Solenoid-actuated mask for automatic exposure control for cameras
US3678821A (en) Warning device for an electronically controlled camera shutter
US3246585A (en) Photographic exposure control mechanism
GB1316633A (en) Exposure control arrangement
US3680453A (en) Photographic apparatus
GB1263156A (en) Cameras
US3611902A (en) Automatic flash photography switchover device
GB1224262A (en) Improvements relating to photographic exposure control apparatus
US3678828A (en) Exposure control device for a camera
GB1205520A (en) Photographic shutter with electronic timing device
GB1251607A (cg-RX-API-DMAC7.html)
GB1093104A (en) Photographic camera

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
435 Patent endorsed 'licences of right' on the date specified (sect. 35/1949)
PCNP Patent ceased through non-payment of renewal fee