JPS57122424A - Automatic dimmer type flash device - Google Patents

Automatic dimmer type flash device

Info

Publication number
JPS57122424A
JPS57122424A JP56197093A JP19709381A JPS57122424A JP S57122424 A JPS57122424 A JP S57122424A JP 56197093 A JP56197093 A JP 56197093A JP 19709381 A JP19709381 A JP 19709381A JP S57122424 A JPS57122424 A JP S57122424A
Authority
JP
Japan
Prior art keywords
flash device
frequency
output
type flash
diaphragm
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
JP56197093A
Other languages
Japanese (ja)
Inventor
Satoshi Takami
Yoshifumi Kuroki
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
Priority to JP56197093A priority Critical patent/JPS57122424A/en
Publication of JPS57122424A publication Critical patent/JPS57122424A/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
    • G03B15/00—Special procedures for taking photographs; Apparatus therefor
    • G03B15/02—Illuminating scene
    • G03B15/03—Combinations of cameras with lighting apparatus; Flash units
    • G03B15/05—Combinations of cameras with electronic flash apparatus; Electronic flash units
    • 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)
  • Stroboscope Apparatuses (AREA)

Abstract

PURPOSE:To set a diaphragm automatically and also to prevent a malfunction, by sending a pulse signal of a prescribed frequency for controlling a diaphragm value of a camera, from a flash device. CONSTITUTION:An output of an oscillator provided on a flash device 1 is divided by a frequency divider 3, and the divided frequency is selected by a switch 4. A pulse signal of the selected frequency is inputted to a gate circuit 8 of a camera device 7 through a terminal 5, a pulse passes through by the gate time decided by a gate control device 9, and is counted by a counter 10. An output of the counter 10 is inputted to a converter 11, and by its output, a diaphragm control device 12 is operated.
JP56197093A 1981-12-08 1981-12-08 Automatic dimmer type flash device Pending JPS57122424A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56197093A JPS57122424A (en) 1981-12-08 1981-12-08 Automatic dimmer type flash device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56197093A JPS57122424A (en) 1981-12-08 1981-12-08 Automatic dimmer type flash device

Publications (1)

Publication Number Publication Date
JPS57122424A true JPS57122424A (en) 1982-07-30

Family

ID=16368604

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56197093A Pending JPS57122424A (en) 1981-12-08 1981-12-08 Automatic dimmer type flash device

Country Status (1)

Country Link
JP (1) JPS57122424A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4573786A (en) * 1983-05-27 1986-03-04 Minolta Camera Kabushiki Kaisha Flash photographing system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5512999A (en) * 1979-07-05 1980-01-29 Canon Inc Light adjusting flash device
JPS5589827A (en) * 1978-12-28 1980-07-07 Ricoh Co Ltd Shutter start control unit of camera

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5589827A (en) * 1978-12-28 1980-07-07 Ricoh Co Ltd Shutter start control unit of camera
JPS5512999A (en) * 1979-07-05 1980-01-29 Canon Inc Light adjusting flash device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4573786A (en) * 1983-05-27 1986-03-04 Minolta Camera Kabushiki Kaisha Flash photographing system

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