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GB1391131A - Exposure value indicating means - Google Patents

Exposure value indicating means

Info

Publication number
GB1391131A
GB1391131A GB940373A GB940373A GB1391131A GB 1391131 A GB1391131 A GB 1391131A GB 940373 A GB940373 A GB 940373A GB 940373 A GB940373 A GB 940373A GB 1391131 A GB1391131 A GB 1391131A
Authority
GB
United Kingdom
Prior art keywords
diodes
exposure
feb
speed
correct
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
GB940373A
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.)
Fujinon Corp
Original Assignee
Fujinon Corp
Fuji Photo Optical 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 Fujinon Corp, Fuji Photo Optical Co Ltd filed Critical Fujinon Corp
Publication of GB1391131A publication Critical patent/GB1391131A/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
    • 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)
  • Analogue/Digital Conversion (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

1391131 Cameras FUJI SHASHIN KOKI KK 26 Feb 1973 [28 Feb 1972] 9403/73 Heading G2A A camera exposure indicator comprises light emitting diodes 21 to 27. A voltage VIN proportional to one or more of light intensity, shutter speed, diaphragm aperture and film speed energizes an appropriate one of the diodes by means of switching circuits 1 to 6 to indicate whether the exposure setting is correct. The diodes may be arranged adjacent a scale of stop valves or shutter speeds, Figs. 5, 6 (not shown) to indicate the aperture or speed necessary for correct exposure. The diodes are preferably visible in the viewfinder.
GB940373A 1972-02-28 1973-02-26 Exposure value indicating means Expired GB1391131A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2033472A JPS532325B2 (en) 1972-02-28 1972-02-28

Publications (1)

Publication Number Publication Date
GB1391131A true GB1391131A (en) 1975-04-16

Family

ID=12024223

Family Applications (1)

Application Number Title Priority Date Filing Date
GB940373A Expired GB1391131A (en) 1972-02-28 1973-02-26 Exposure value indicating means

Country Status (4)

Country Link
JP (1) JPS532325B2 (en)
DE (1) DE7307475U (en)
FR (1) FR2174628A5 (en)
GB (1) GB1391131A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4233598A (en) 1977-08-30 1980-11-11 Molins Limited Emergency stop circuit monitoring system
GB2187054A (en) * 1986-02-21 1987-08-26 Stc Plc Analogue to digital converters

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51140626A (en) * 1975-05-28 1976-12-03 Minolta Camera Co Ltd Digital indication device
JPS5428624A (en) * 1977-08-05 1979-03-03 Minolta Camera Co Ltd Digital display device of f/stops of cameras
JPS5434822A (en) * 1977-08-24 1979-03-14 Hitachi Ltd Dot alley type display device
JPS5659320A (en) * 1979-10-17 1981-05-22 Matsushita Electric Ind Co Ltd Voltage control resistance equipment

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4233598A (en) 1977-08-30 1980-11-11 Molins Limited Emergency stop circuit monitoring system
GB2187054A (en) * 1986-02-21 1987-08-26 Stc Plc Analogue to digital converters
GB2187054B (en) * 1986-02-21 1989-04-26 Stc Plc Analogue to digital converters

Also Published As

Publication number Publication date
DE2309764B2 (en) 1975-03-06
FR2174628A5 (en) 1973-10-12
JPS4890226A (en) 1973-11-24
DE2309764A1 (en) 1973-09-13
JPS532325B2 (en) 1978-01-27
DE7307475U (en) 1973-12-06

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Legal Events

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