GB1440326A - Camera with exposure time indicator - Google Patents

Camera with exposure time indicator

Info

Publication number
GB1440326A
GB1440326A GB4374673A GB4374673A GB1440326A GB 1440326 A GB1440326 A GB 1440326A GB 4374673 A GB4374673 A GB 4374673A GB 4374673 A GB4374673 A GB 4374673A GB 1440326 A GB1440326 A GB 1440326A
Authority
GB
United Kingdom
Prior art keywords
resistors
exposure time
camera
sept
meter
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
GB4374673A
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 GB1440326A publication Critical patent/GB1440326A/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
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/18—Signals indicating condition of a camera member or suitability of light
    • G03B17/20—Signals indicating condition of a camera member or suitability of light visible in viewfinder

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Indication In Cameras, And Counting Of Exposures (AREA)
  • Shutter-Related Mechanisms (AREA)
  • Exposure Control For Cameras (AREA)

Abstract

1440326 Cameras ASAHI KOGAKU KOGYO KK 18 Sept 1973 [22 Sept 1972] 43746/73 Heading G2A A camera has a meter 21 which indicates an automatically determined or manually selected exposure time. Exposure time is determined automatically by a CdS element 6, aperture and film speed setting resistors 9 and 12, log compression elements 7, 10, 13, computation circuits 8, 11, an integrating capacitor 15, a switching circuit 16 and a shutter controlling electromagnet 17. For manual control selectable resistors r 1 r 2 ... in and fixed resistors 18 and 19 are switched in to replace element 6 and resistors 9, 12. The meter 21 with an amplifier 22 is connected across circuit 11.
GB4374673A 1972-09-22 1973-09-18 Camera with exposure time indicator Expired GB1440326A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11028972U JPS4967632U (en) 1972-09-22 1972-09-22

Publications (1)

Publication Number Publication Date
GB1440326A true GB1440326A (en) 1976-06-23

Family

ID=14531912

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4374673A Expired GB1440326A (en) 1972-09-22 1973-09-18 Camera with exposure time indicator

Country Status (3)

Country Link
JP (1) JPS4967632U (en)
DE (1) DE2346222C3 (en)
GB (1) GB1440326A (en)

Also Published As

Publication number Publication date
DE2346222A1 (en) 1974-04-04
DE2346222C3 (en) 1975-09-18
DE2346222B2 (en) 1975-02-13
JPS4967632U (en) 1974-06-13

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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