GB2036990B - Camera exposure control circuit - Google Patents

Camera exposure control circuit

Info

Publication number: GB2036990B
Authority: GB; United Kingdom
Prior art keywords: control circuit; exposure control; camera exposure; camera; circuit
Prior art date: 1978-12-01
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

GB7938842A

Other languages

English (en)

Other versions

GB2036990A (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.)

Pentacon GmbH Foto und Feinwerktechnik

Original Assignee

Pentacon Dresden VEB

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.)

1978-12-01

Filing date

1979-11-09

Publication date

1983-03-09

1979-11-09 Application filed by Pentacon Dresden VEB filed Critical Pentacon Dresden VEB

1980-07-02 Publication of GB2036990A publication Critical patent/GB2036990A/en

1983-03-09 Application granted granted Critical

1983-03-09 Publication of GB2036990B publication Critical patent/GB2036990B/en

Status Expired legal-status Critical Current

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
- G03B7/087—Analogue circuits for control of both exposure time and 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
- G03B7/089—Analogue circuits for storage of exposure value in mirror reflex cameras

Landscapes

Physics & Mathematics (AREA)
General Physics & Mathematics (AREA)
Exposure Control For Cameras (AREA)

GB7938842A 1978-12-01 1979-11-09 Camera exposure control circuit Expired GB2036990B (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DD78209448A DD140297A1 (de)	1978-12-01	1978-12-01	Schaltungsanordnung zur belichtungseinstellung

Publications (2)

Publication Number	Publication Date
GB2036990A GB2036990A (en)	1980-07-02
GB2036990B true GB2036990B (en)	1983-03-09

Family

ID=5515591

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
GB7938842A Expired GB2036990B (en)	1978-12-01	1979-11-09	Camera exposure control circuit

Country Status (3)

Country	Link
DD (1)	DD140297A1 (de)
DE (1)	DE2941547C2 (de)
GB (1)	GB2036990B (de)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3988748A (en) *	1973-12-26	1976-10-26	Canon Kabushiki Kaisha	Single lens reflex camera

1978
- 1978-12-01 DD DD78209448A patent/DD140297A1/de not_active IP Right Cessation
1979
- 1979-10-13 DE DE2941547A patent/DE2941547C2/de not_active Expired
- 1979-11-09 GB GB7938842A patent/GB2036990B/en not_active Expired

Also Published As

Publication number	Publication date
DE2941547A1 (de)	1980-06-12
DE2941547C2 (de)	1982-12-30
DD140297A1 (de)	1980-02-20
GB2036990A (en)	1980-07-02

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Legal Events

Date	Code	Title	Description
1991-07-03	PCNP	Patent ceased through non-payment of renewal fee