JPS5587132A - Light emission control system of electronic flash - Google Patents

Light emission control system of electronic flash

Info

Publication number
JPS5587132A
JPS5587132A JP15815578A JP15815578A JPS5587132A JP S5587132 A JPS5587132 A JP S5587132A JP 15815578 A JP15815578 A JP 15815578A JP 15815578 A JP15815578 A JP 15815578A JP S5587132 A JPS5587132 A JP S5587132A
Authority
JP
Japan
Prior art keywords
dimming
light emission
dimming signal
flash
type
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
JP15815578A
Other languages
Japanese (ja)
Inventor
Kazuhiro Okada
Takanori Horikoshi
Minoru Kawada
Kazuo Makimura
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.)
Mamiya OP Co Ltd
Original Assignee
Mamiya Camera 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 Mamiya Camera Co Ltd filed Critical Mamiya Camera Co Ltd
Priority to JP15815578A priority Critical patent/JPS5587132A/en
Publication of JPS5587132A publication Critical patent/JPS5587132A/en
Pending legal-status Critical Current

Links

Landscapes

  • Exposure Control For Cameras (AREA)
  • Stroboscope Apparatuses (AREA)

Abstract

PURPOSE: To achieve the improvement in the operating characteristic of the camera mounted with the automatic dimming type electronic flash by outputting the dimming signal from the camera side only when it is judged that the light emission of the flash is necessary in order to obtain correct exposure.
CONSTITUTION: The dimming signal of radiated light type or reflected light type is output from an arithmetic control circuit 5 dependng upon the presence or not of distance information in arithmetic information input 1. Whereas, if the arithmetic control circuit 5 judges that the light emission of the flash (EF) is not required for obtaining correct exposure as a result of operations, it does not output the dimming signal. And the EF side which has received the dimming signal from the camera side performs dimming corresponding to the respective dimming signals but when there is no input of the dimming signal, it inhibits the light emission of the lamp. In this way, the operating characteristic of the camera mounted with the automatic dimming type EF may be considerably enhanced and always correct exposure obtained.
COPYRIGHT: (C)1980,JPO&Japio
JP15815578A 1978-12-23 1978-12-23 Light emission control system of electronic flash Pending JPS5587132A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15815578A JPS5587132A (en) 1978-12-23 1978-12-23 Light emission control system of electronic flash

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15815578A JPS5587132A (en) 1978-12-23 1978-12-23 Light emission control system of electronic flash

Publications (1)

Publication Number Publication Date
JPS5587132A true JPS5587132A (en) 1980-07-01

Family

ID=15665459

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15815578A Pending JPS5587132A (en) 1978-12-23 1978-12-23 Light emission control system of electronic flash

Country Status (1)

Country Link
JP (1) JPS5587132A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5859426A (en) * 1981-10-05 1983-04-08 Minolta Camera Co Ltd Dimming controlling circuit for autostrobe
JPS59191023A (en) * 1983-04-14 1984-10-30 Ricoh Co Ltd electronic flash device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5859426A (en) * 1981-10-05 1983-04-08 Minolta Camera Co Ltd Dimming controlling circuit for autostrobe
JPS59191023A (en) * 1983-04-14 1984-10-30 Ricoh Co Ltd electronic flash device

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