JPS5560931A - Synchronizing contact device of electric shutter - Google Patents
Synchronizing contact device of electric shutterInfo
- Publication number
- JPS5560931A JPS5560931A JP13431078A JP13431078A JPS5560931A JP S5560931 A JPS5560931 A JP S5560931A JP 13431078 A JP13431078 A JP 13431078A JP 13431078 A JP13431078 A JP 13431078A JP S5560931 A JPS5560931 A JP S5560931A
- Authority
- JP
- Japan
- Prior art keywords
- time
- flash photography
- shutter
- synchro
- exposure
- 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
Links
Landscapes
- Exposure Control For Cameras (AREA)
- Shutter-Related Mechanisms (AREA)
Abstract
PURPOSE: To surely synchronize even in the daytime synchro-flash photography and obtain correct exposure by providing a synchronizing switch which is turned ON by the signal of the ealier of shutter closing start time and delay time corresponding to object distance.
CONSTITUTION: In day-time synchro-flash photography, exposure time is shorter as the photo current of a photo detector 10 is large. Hence, a comparator 16 inverts early to de-energize a shutter-closing magnet 17. At the same time, a diode 23 is reverse-biased and therefore a capacitor 24 starts discharging, hence trasistors 27 then 36 go OFF. Because of this, firing current enters the gate of a thyristor 40 to turn this ON and emit light. In this way, strobe is let to emit light at the start of shutter closing and correct exposure may be obtained in the daytime synchro-flash photography of a short exposure time.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13431078A JPS5560931A (en) | 1978-10-31 | 1978-10-31 | Synchronizing contact device of electric shutter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13431078A JPS5560931A (en) | 1978-10-31 | 1978-10-31 | Synchronizing contact device of electric shutter |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5560931A true JPS5560931A (en) | 1980-05-08 |
JPS6235096B2 JPS6235096B2 (en) | 1987-07-30 |
Family
ID=15125298
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13431078A Granted JPS5560931A (en) | 1978-10-31 | 1978-10-31 | Synchronizing contact device of electric shutter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5560931A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5743439U (en) * | 1980-08-26 | 1982-03-10 | ||
JPS6051824A (en) * | 1983-08-31 | 1985-03-23 | Seiko Koki Kk | Flashmatic device of camera |
JPS61126233U (en) * | 1985-01-26 | 1986-08-08 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5144925A (en) * | 1974-10-15 | 1976-04-16 | Canon Kk |
-
1978
- 1978-10-31 JP JP13431078A patent/JPS5560931A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5144925A (en) * | 1974-10-15 | 1976-04-16 | Canon Kk |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5743439U (en) * | 1980-08-26 | 1982-03-10 | ||
JPS6051824A (en) * | 1983-08-31 | 1985-03-23 | Seiko Koki Kk | Flashmatic device of camera |
JPH058408B2 (en) * | 1983-08-31 | 1993-02-02 | Seikosha Kk | |
JPS61126233U (en) * | 1985-01-26 | 1986-08-08 |
Also Published As
Publication number | Publication date |
---|---|
JPS6235096B2 (en) | 1987-07-30 |
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