GB1483858A - Photographic camera exposure control circuit - Google Patents

Photographic camera exposure control circuit

Info

Publication number
GB1483858A
GB1483858A GB845675A GB845675A GB1483858A GB 1483858 A GB1483858 A GB 1483858A GB 845675 A GB845675 A GB 845675A GB 845675 A GB845675 A GB 845675A GB 1483858 A GB1483858 A GB 1483858A
Authority
GB
United Kingdom
Prior art keywords
control circuit
transistor
amplifier
lamp
exposure control
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
GB845675A
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.)
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.)
Filing date
Publication date
Priority claimed from DD17694374A external-priority patent/DD110363A1/xx
Priority claimed from DD17842674A external-priority patent/DD111475A1/xx
Application filed by Pentacon Dresden VEB filed Critical Pentacon Dresden VEB
Publication of GB1483858A publication Critical patent/GB1483858A/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Stroboscope Apparatuses (AREA)
  • Exposure Control For Cameras (AREA)
  • Amplifiers (AREA)
GB845675A 1974-03-05 1975-02-28 Photographic camera exposure control circuit Expired GB1483858A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DD17694374A DD110363A1 (enrdf_load_stackoverflow) 1974-03-05 1974-03-05
DD17842674A DD111475A1 (enrdf_load_stackoverflow) 1974-05-10 1974-05-10

Publications (1)

Publication Number Publication Date
GB1483858A true GB1483858A (en) 1977-08-24

Family

ID=25747521

Family Applications (1)

Application Number Title Priority Date Filing Date
GB845675A Expired GB1483858A (en) 1974-03-05 1975-02-28 Photographic camera exposure control circuit

Country Status (4)

Country Link
DE (1) DE2460151A1 (enrdf_load_stackoverflow)
FR (1) FR2263526B3 (enrdf_load_stackoverflow)
GB (1) GB1483858A (enrdf_load_stackoverflow)
SU (1) SU953612A1 (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
FR2263526A1 (enrdf_load_stackoverflow) 1975-10-03
DE2460151A1 (de) 1975-09-18
SU953612A1 (ru) 1982-08-23
FR2263526B3 (enrdf_load_stackoverflow) 1977-10-21

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Legal Events

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