JPS5784441A - Photometric device - Google Patents

Photometric device

Info

Publication number
JPS5784441A
JPS5784441A JP16109380A JP16109380A JPS5784441A JP S5784441 A JPS5784441 A JP S5784441A JP 16109380 A JP16109380 A JP 16109380A JP 16109380 A JP16109380 A JP 16109380A JP S5784441 A JPS5784441 A JP S5784441A
Authority
JP
Japan
Prior art keywords
circuit
photometric
weighting
accordance
output
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.)
Pending
Application number
JP16109380A
Other languages
Japanese (ja)
Inventor
Toru Matsui
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.)
Minolta Co Ltd
Original Assignee
Minolta 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 Minolta Co Ltd filed Critical Minolta Co Ltd
Priority to JP16109380A priority Critical patent/JPS5784441A/en
Publication of JPS5784441A publication Critical patent/JPS5784441A/en
Pending 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
    • G03B7/091—Digital circuits

Landscapes

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

Abstract

PURPOSE:To vary and select a photometric system optionally and continuously, by providing an output weighting circuit of plural photodetecting elements for photometry of different parts, and a weighting variation means. CONSTITUTION:Each photodetecting element signal outputted by synchronizing with a clock from a photometric circuit 14 is inputted to a weigthing circuit 18 through an amplifying and converting circuit, and an added value of this output, and a weighted average are obtained by a register 22 and a register 24, respectively. This weighted average is inputted to an exposing and operating circuit 25. On the other hand, weighting is decided by a controlling circuit 19. The controlling circuit 19 is constituted of an input setting circuit 30 for generating various data signals in accordance with selection of the photometric system, window circuits 53, 54 for indicating an effective photometric part, a counter 73 for varying the frequency of an output pulse in accordance with setting of a photometric area, a circuit for varying a weighting curve in accordance with said frequency, etc.
JP16109380A 1980-11-14 1980-11-14 Photometric device Pending JPS5784441A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16109380A JPS5784441A (en) 1980-11-14 1980-11-14 Photometric device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16109380A JPS5784441A (en) 1980-11-14 1980-11-14 Photometric device

Publications (1)

Publication Number Publication Date
JPS5784441A true JPS5784441A (en) 1982-05-26

Family

ID=15728468

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16109380A Pending JPS5784441A (en) 1980-11-14 1980-11-14 Photometric device

Country Status (1)

Country Link
JP (1) JPS5784441A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6026937A (en) * 1983-07-26 1985-02-09 Nippon Kogaku Kk <Nikon> Photometric device for camera
JPS6235327A (en) * 1985-08-08 1987-02-16 Canon Inc Photometry device
JPH01216325A (en) * 1988-02-24 1989-08-30 Canon Inc Exposure determining device for camera or the like
US5434640A (en) * 1992-08-12 1995-07-18 Nikon Corporation Exposure calculation device for camera
US5576800A (en) * 1991-11-21 1996-11-19 Nikon Corporation Camera having an auxiliary photographing function

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6026937A (en) * 1983-07-26 1985-02-09 Nippon Kogaku Kk <Nikon> Photometric device for camera
JPS6235327A (en) * 1985-08-08 1987-02-16 Canon Inc Photometry device
JPH01216325A (en) * 1988-02-24 1989-08-30 Canon Inc Exposure determining device for camera or the like
US5576800A (en) * 1991-11-21 1996-11-19 Nikon Corporation Camera having an auxiliary photographing function
US5434640A (en) * 1992-08-12 1995-07-18 Nikon Corporation Exposure calculation device for camera

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