GB1369695A - Electric shutter control system for a camera employing a through-the lens light measuring system - Google Patents

Electric shutter control system for a camera employing a through-the lens light measuring system

Info

Publication number
GB1369695A
GB1369695A GB5834171A GB5834171A GB1369695A GB 1369695 A GB1369695 A GB 1369695A GB 5834171 A GB5834171 A GB 5834171A GB 5834171 A GB5834171 A GB 5834171A GB 1369695 A GB1369695 A GB 1369695A
Authority
GB
United Kingdom
Prior art keywords
shutter control
light measuring
electric shutter
lens light
control system
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
GB5834171A
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 GB1369695A publication Critical patent/GB1369695A/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)
  • Studio Devices (AREA)
  • Adjustment Of Camera Lenses (AREA)
  • Exposure Control For Cameras (AREA)
  • Shutters For Cameras (AREA)
  • Stroboscope Apparatuses (AREA)
GB5834171A 1970-12-26 1971-12-15 Electric shutter control system for a camera employing a through-the lens light measuring system Expired GB1369695A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP45125252A JPS4836893B1 (US06653308-20031125-C00199.png) 1970-12-26 1970-12-26

Publications (1)

Publication Number Publication Date
GB1369695A true GB1369695A (en) 1974-10-09

Family

ID=14905504

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5834171A Expired GB1369695A (en) 1970-12-26 1971-12-15 Electric shutter control system for a camera employing a through-the lens light measuring system

Country Status (4)

Country Link
US (1) US3712191A (US06653308-20031125-C00199.png)
JP (1) JPS4836893B1 (US06653308-20031125-C00199.png)
DE (1) DE2163277C3 (US06653308-20031125-C00199.png)
GB (1) GB1369695A (US06653308-20031125-C00199.png)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE773590A (nl) * 1971-10-07 1972-04-07 Agfa Gevaert Nv Reprografische camera,
US4048643A (en) * 1975-12-16 1977-09-13 Tokyo Shibaura Electric Co., Ltd. Exposure computation system
JPS5636628A (en) * 1979-09-03 1981-04-09 Asahi Optical Co Ltd Memory device in phase synchronizing type automatic exposure control mechanism

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3641890A (en) * 1967-10-31 1972-02-15 Nippon Kogaku Kk Exposure-measuring device for cameras provided with electronic shutter

Also Published As

Publication number Publication date
US3712191A (en) 1973-01-23
JPS4836893B1 (US06653308-20031125-C00199.png) 1973-11-07
DE2163277B2 (de) 1973-08-09
DE2163277C3 (de) 1974-02-28
DE2163277A1 (de) 1972-07-06

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee