JPS5688126A - Speed light device - Google Patents

Speed light device

Info

Publication number
JPS5688126A
JPS5688126A JP16566179A JP16566179A JPS5688126A JP S5688126 A JPS5688126 A JP S5688126A JP 16566179 A JP16566179 A JP 16566179A JP 16566179 A JP16566179 A JP 16566179A JP S5688126 A JPS5688126 A JP S5688126A
Authority
JP
Japan
Prior art keywords
circuit
photometric
dimming
signal
light
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.)
Granted
Application number
JP16566179A
Other languages
Japanese (ja)
Other versions
JPH0146857B2 (en
Inventor
Hiroshi Hasegawa
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.)
Nikon Corp
Nippon Chemical Industrial Co Ltd
Original Assignee
Nippon Chemical Industrial Co Ltd
Nippon Kogaku KK
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 Nippon Chemical Industrial Co Ltd, Nippon Kogaku KK filed Critical Nippon Chemical Industrial Co Ltd
Priority to JP16566179A priority Critical patent/JPS5688126A/en
Priority to US06/215,345 priority patent/US4359275A/en
Priority to GB8040664A priority patent/GB2067773A/en
Priority to DE19803048136 priority patent/DE3048136A1/en
Priority to FR8027083A priority patent/FR2472202A1/fr
Publication of JPS5688126A publication Critical patent/JPS5688126A/en
Publication of JPH0146857B2 publication Critical patent/JPH0146857B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To prevent the waste of films by such constitution in which a correcting circuit changing-over the photometric sensitivity of a TTL photometric circuit in cooperation with test light emission is provided in a manner as to provide the same measuring conditions as those of film plane photometry in the ordinary photometric state of a speed light device and an automatic dimming device displays whether dimming is possible or not.
CONSTITUTION: The image pickup light past an image pickup lens 2 passes the semitransparent part of a return mirror 5, is reflected by a mirror 6 and enters a photoelectric element 7. The output 21 thereof is sent to the photometric circuit 12 of an automatic dimming circuit 11. Additionally, an aperture signal 22 is held inputted to the photometric circuit 12. When a test switch 15 is closed, a control circuit 14 oututs the light emission of a flash discharge tube 13 and the correction signal 24 making the correction of the photometric sensitivity to the automatic dimming circuit 11. An alarm display circuit 16 receives the start signal 23 and the stop signal 25 by the results of the photometric operation of the photometric circuit 12, and when out of the dimming range, it emits an alarm by flickering a light emitting diode 17. The operation at the photographing is accomplished by a known method. Hence, the waste of the film is prevented.
COPYRIGHT: (C)1981,JPO&Japio
JP16566179A 1979-12-21 1979-12-21 Speed light device Granted JPS5688126A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP16566179A JPS5688126A (en) 1979-12-21 1979-12-21 Speed light device
US06/215,345 US4359275A (en) 1979-12-21 1980-12-11 Single lens reflex camera system capable of TTL flash output control
GB8040664A GB2067773A (en) 1979-12-21 1980-12-18 Single lens reflex camera system capable of ttl flash output control
DE19803048136 DE3048136A1 (en) 1979-12-21 1980-12-19 CAMERA SYSTEM WITH TTL CONTROL OF THE FLASH LIGHT
FR8027083A FR2472202A1 (en) 1979-12-21 1980-12-19

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16566179A JPS5688126A (en) 1979-12-21 1979-12-21 Speed light device

Publications (2)

Publication Number Publication Date
JPS5688126A true JPS5688126A (en) 1981-07-17
JPH0146857B2 JPH0146857B2 (en) 1989-10-11

Family

ID=15816604

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16566179A Granted JPS5688126A (en) 1979-12-21 1979-12-21 Speed light device

Country Status (1)

Country Link
JP (1) JPS5688126A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52150026A (en) * 1976-06-08 1977-12-13 Canon Inc Automatic exposure control camera
JPS5319072U (en) * 1976-07-24 1978-02-18
JPS5540413A (en) * 1978-09-15 1980-03-21 Olympus Optical Co Ltd Test light emitting device of ttl control strobe

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52150026A (en) * 1976-06-08 1977-12-13 Canon Inc Automatic exposure control camera
JPS5319072U (en) * 1976-07-24 1978-02-18
JPS5540413A (en) * 1978-09-15 1980-03-21 Olympus Optical Co Ltd Test light emitting device of ttl control strobe

Also Published As

Publication number Publication date
JPH0146857B2 (en) 1989-10-11

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