GB1540032A - Exposure measurement in cameras - Google Patents

Exposure measurement in cameras

Info

Publication number
GB1540032A
GB1540032A GB2412477A GB2412477A GB1540032A GB 1540032 A GB1540032 A GB 1540032A GB 2412477 A GB2412477 A GB 2412477A GB 2412477 A GB2412477 A GB 2412477A GB 1540032 A GB1540032 A GB 1540032A
Authority
GB
United Kingdom
Prior art keywords
cameras
exposure measurement
exposure
measurement
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
GB2412477A
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 DD19332376A external-priority patent/DD128145A1/en
Priority claimed from DD19332476A external-priority patent/DD128146A1/en
Priority claimed from DD19332576A external-priority patent/DD128147A1/en
Application filed by Pentacon Dresden VEB filed Critical Pentacon Dresden VEB
Publication of GB1540032A publication Critical patent/GB1540032A/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
    • G03B19/00—Cameras
    • G03B19/02—Still-picture cameras
    • G03B19/12—Reflex cameras with single objective and a movable reflector or a partly-transmitting mirror
    • 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
    • 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
    • G03B7/09972—Through the lens [TTL] measuring in mirror-reflex cameras using the mirror as sensor light reflecting or transmitting member

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Cameras In General (AREA)
  • Exposure Control For Cameras (AREA)
  • Studio Devices (AREA)
GB2412477A 1976-06-11 1977-06-09 Exposure measurement in cameras Expired GB1540032A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DD19332376A DD128145A1 (en) 1976-06-11 1976-06-11 ARRANGEMENT FOR EXPOSURE INSIGHT MEASUREMENT FOR EASY MIRROR REFLEX CAMERAS
DD19332476A DD128146A1 (en) 1976-06-11 1976-06-11 UNIQUE MIRROR REFLECTING CAMERA WITH EXPOSURE MEASURING DEVICE
DD19332576A DD128147A1 (en) 1976-06-11 1976-06-11 UNIQUE MIRROR REFLECTING CAMERA WITH EXPOSURE MEASURING DEVICE

Publications (1)

Publication Number Publication Date
GB1540032A true GB1540032A (en) 1979-02-07

Family

ID=27179816

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2412477A Expired GB1540032A (en) 1976-06-11 1977-06-09 Exposure measurement in cameras

Country Status (2)

Country Link
DE (2) DE7714641U1 (en)
GB (1) GB1540032A (en)

Also Published As

Publication number Publication date
DE2720751B2 (en) 1980-02-28
DE2720751C3 (en) 1980-10-30
DE7714641U1 (en) 1977-09-22
DE2720751A1 (en) 1977-12-15

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Legal Events

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