JPS58102224A - Electronic flash device - Google Patents

Electronic flash device

Info

Publication number
JPS58102224A
JPS58102224A JP56202170A JP20217081A JPS58102224A JP S58102224 A JPS58102224 A JP S58102224A JP 56202170 A JP56202170 A JP 56202170A JP 20217081 A JP20217081 A JP 20217081A JP S58102224 A JPS58102224 A JP S58102224A
Authority
JP
Japan
Prior art keywords
circuit
luminance
turned
power supply
flash
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
JP56202170A
Other languages
Japanese (ja)
Inventor
Hirohito Maruyama
Tsunemi Yoshino
Katsumi Horinishi
Original Assignee
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 Electric Co Ltd filed Critical West Electric Co Ltd
Priority to JP56202170A priority Critical patent/JPS58102224A/en
Publication of JPS58102224A publication Critical patent/JPS58102224A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS 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
    • G03B15/00Special procedures for taking photographs; Apparatus therefor
    • G03B15/02Illuminating scene
    • G03B15/03Combinations of cameras with lighting apparatus; Flash units
    • G03B15/05Combinations of cameras with electronic flash apparatus; Electronic flash units
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS 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
    • G03B2215/00Special procedures for taking photographs; Apparatus therefor
    • G03B2215/05Combinations of cameras with electronic flash units

Abstract

PURPOSE:To cause no photographing error even in case of a camera having no camera shake alarm informing means, by executing photometry of luminance of an object to be phtotgraphed, informing the low luminance in case of a prescribed value or below, also supplying a DC power supply to a main capacitor of an electronic flash device. CONSTITUTION:When a switch (S) 9 is turned on, a base current flows to a transistor (TR) 10 from a DC power supply 1, the TR10 is turned on, electric power is supplied to a photometric circuit 13, luminance of an object to be photographed is photodetected by a photodetector 11, and it is detected by a luminance level detecting circuit 12. In a state that there is the possibility of causing a camera shake due to a low detecting level of luminance of the object to be photographed, the fact that light emission of a flash tube 7 is required is informed by an alarm informing circuit 8, by an output signal from the circuit 2 is also operated, the electric power supply 1 is supplid to a DC-DC converting circuit 3, and a main capacitor 4 is charged. When a trigger S5 is turned on after prescribed charging, a triggering circuit 6 is operated, the flash tube 7 emits light, and flash photographing is executed. In this wya, photographing error can be prevented.
JP56202170A 1981-12-14 1981-12-14 Electronic flash device Pending JPS58102224A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56202170A JPS58102224A (en) 1981-12-14 1981-12-14 Electronic flash device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56202170A JPS58102224A (en) 1981-12-14 1981-12-14 Electronic flash device

Publications (1)

Publication Number Publication Date
JPS58102224A true JPS58102224A (en) 1983-06-17

Family

ID=16453117

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56202170A Pending JPS58102224A (en) 1981-12-14 1981-12-14 Electronic flash device

Country Status (1)

Country Link
JP (1) JPS58102224A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2635201A1 (en) * 1988-06-30 1990-02-09 Asahi Optical Co Ltd Camera with automatic flash

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2635201A1 (en) * 1988-06-30 1990-02-09 Asahi Optical Co Ltd Camera with automatic flash

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