JPS5779924A - Exposure controller - Google Patents

Exposure controller

Info

Publication number
JPS5779924A
JPS5779924A JP55156817A JP15681780A JPS5779924A JP S5779924 A JPS5779924 A JP S5779924A JP 55156817 A JP55156817 A JP 55156817A JP 15681780 A JP15681780 A JP 15681780A JP S5779924 A JPS5779924 A JP S5779924A
Authority
JP
Japan
Prior art keywords
circuit
signal
controlling
aperture
liquid crystal
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
JP55156817A
Other languages
Japanese (ja)
Inventor
Toshiji Kashiwara
Hiroshi Iwata
Tsunemi Yoshino
Akitoshi Morioka
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.)
WEST DENKI KK
West Electric Co Ltd
Original Assignee
WEST DENKI KK
West Electric 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 WEST DENKI KK, West Electric Co Ltd filed Critical WEST DENKI KK
Priority to JP55156817A priority Critical patent/JPS5779924A/en
Publication of JPS5779924A publication Critical patent/JPS5779924A/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
    • G03B7/16—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly in accordance with both the intensity of the flash source and the distance of the flash source from the object, e.g. in accordance with the "guide number" of the flash bulb and the focusing of the camera

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Exposure Control For Cameras (AREA)
  • Focusing (AREA)
  • Stroboscope Apparatuses (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

PURPOSE:To achieve high-precision exposure controlling operation and to set flash photographing operation automatically, by controlling a liquid crystal diaphragm, etc., on the basis of a light-quantity signal and a distance measuring signal. CONSTITUTION:As a strobe device 3 is held in readiness for operation, a light- quantity signal from a generating circuit 8 is supplied to an arithmetic circuit 7 in a photographic lens device 1 to perform arithmetic with a signal from a distance measuring circuit 4, outputting an aperture-value controling signal. The aperture-value controlling signal is supplied preferentially to a drive controlling circuit 5 through a switching circuit 7. The circuit 7, when there is no control signal, supplies the output signal of an exposure controlling circuit 9 in a camera 2 to the circuit 5. The output of the circuit 5 controls a liquid crystal diaphragm 6.
JP55156817A 1980-11-06 1980-11-06 Exposure controller Pending JPS5779924A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55156817A JPS5779924A (en) 1980-11-06 1980-11-06 Exposure controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55156817A JPS5779924A (en) 1980-11-06 1980-11-06 Exposure controller

Publications (1)

Publication Number Publication Date
JPS5779924A true JPS5779924A (en) 1982-05-19

Family

ID=15635978

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55156817A Pending JPS5779924A (en) 1980-11-06 1980-11-06 Exposure controller

Country Status (1)

Country Link
JP (1) JPS5779924A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58158625A (en) * 1982-03-16 1983-09-20 Nisshin Sangyo Kk Automatic varying device for quantity of strobe light

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49110337A (en) * 1973-02-20 1974-10-21
JPS5447624A (en) * 1977-09-21 1979-04-14 Canon Inc Camera with built-in flash device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49110337A (en) * 1973-02-20 1974-10-21
JPS5447624A (en) * 1977-09-21 1979-04-14 Canon Inc Camera with built-in flash device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58158625A (en) * 1982-03-16 1983-09-20 Nisshin Sangyo Kk Automatic varying device for quantity of strobe light

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