GB1398942A - Camera exposure time control device - Google Patents

Camera exposure time control device

Info

Publication number
GB1398942A
GB1398942A GB3963973A GB3963973A GB1398942A GB 1398942 A GB1398942 A GB 1398942A GB 3963973 A GB3963973 A GB 3963973A GB 3963973 A GB3963973 A GB 3963973A GB 1398942 A GB1398942 A GB 1398942A
Authority
GB
United Kingdom
Prior art keywords
shutter
resistor
aug
diaphragm
photo
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
GB3963973A
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.)
Pentax Corp
Original Assignee
Asahi Kogaku Kogyo Co Ltd
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 Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Publication of GB1398942A publication Critical patent/GB1398942A/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
    • 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
    • G03B9/00—Exposure-making shutters; Diaphragms
    • G03B9/58—Means for varying duration of "open" period of shutter

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Shutter-Related Mechanisms (AREA)
  • Exposure Control For Cameras (AREA)
  • Shutters For Cameras (AREA)
GB3963973A 1972-08-29 1973-08-21 Camera exposure time control device Expired GB1398942A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1972100837U JPS5344444Y2 (enExample) 1972-08-29 1972-08-29

Publications (1)

Publication Number Publication Date
GB1398942A true GB1398942A (en) 1975-06-25

Family

ID=14284414

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3963973A Expired GB1398942A (en) 1972-08-29 1973-08-21 Camera exposure time control device

Country Status (3)

Country Link
JP (1) JPS5344444Y2 (enExample)
DE (1) DE2343384A1 (enExample)
GB (1) GB1398942A (enExample)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3683767A (en) * 1970-06-22 1972-08-15 Minolta Camera Kk Electronic shutter system
US3742475A (en) * 1971-03-16 1973-06-26 Tif Instr Inc Gaseous impurity detector employing corona discharge phenomenon

Also Published As

Publication number Publication date
JPS4958346U (enExample) 1974-05-23
JPS5344444Y2 (enExample) 1978-10-25
DE2343384A1 (de) 1974-03-21

Similar Documents

Publication Publication Date Title
GB1407547A (en) Aperture setting for photographic or cinematorgraphic camera
GB1390633A (en) Automatic exposure control system for a single lens reflex camera
GB1363008A (en) Device for controlling exposure time in a camera
GB1199056A (en) Interchangeable Objectives for a Reflex Camera
GB1440599A (en) Flash system for a camera
GB1421834A (en) Electric exposure time control arrangement for a camera
GB1161744A (en) Improvements relating to photometers for use in photographic cameras
GB1082860A (en) Photographic camera shutter with an electronic timing device
GB1398942A (en) Camera exposure time control device
GB1527085A (en) Method and apparatus for automatically controlling the aperture value of a camera diaphragm
GB1273031A (en) Exposure control system for a camera
GB1464769A (en) Automaitc exposure control systems and light metering systems for cameras
GB1531839A (en) Single lens reflex camera
US3753613A (en) Motion picture camera with adjustable shutter means
GB1123579A (en) Device for automatic regulation of a photographic exposure
GB1480885A (en) Exposure control circuit for a camera shutter
GB1291954A (en) Aperture control device
GB1487021A (en) Cinecamera capable of automatic time exposure
GB1275650A (en) Exposure and shutter control systems for cameras
GB1281897A (en) Exposure control system for a camera
GB1376080A (en) Exposure-determing device for a camera
GB1303715A (enExample)
GB1405533A (en) Exposure time control device for use in cameras
GB1085806A (en) Improvements in or relating to enlarging exposure meters and electronic timers
GB1423274A (en) Camera exposure time and shutter control circuits

Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee