JPS5587131A - Dimming system of electronic flash - Google Patents
Dimming system of electronic flashInfo
- Publication number
- JPS5587131A JPS5587131A JP15815478A JP15815478A JPS5587131A JP S5587131 A JPS5587131 A JP S5587131A JP 15815478 A JP15815478 A JP 15815478A JP 15815478 A JP15815478 A JP 15815478A JP S5587131 A JPS5587131 A JP S5587131A
- Authority
- JP
- Japan
- Prior art keywords
- dimming
- light type
- distance information
- control signal
- reflected 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
Links
Landscapes
- Stroboscope Apparatuses (AREA)
- Exposure Control For Cameras (AREA)
Abstract
PURPOSE: To enable dimming of radiated light type or reflected light type dimming to be performed on the EF side by outputting the different control signals for dimming according to the presence or not of distance information from the camera side.
CONSTITUTION: When there is no distance information in the operating information input 1 having information signals to become exposure-determining factors, an arithmetic control circuit 5 performs specified operations, subjects this to D/A conversion 6 and outputs a voltage signal VGv. This signal is the control signal for dimming of reflected light type. If there is distance information in the input 1, it makes the specified operations similarly and outputs the control signal VGv for dimming of radiated light type after D/A conversion 6. The EF side which has received the control signal from the camera side identifies whether the control signal is which, and changes over the dimming circuit to perform dimming of reflected light type when there is no distance information and that of radiated light type when there is distance information. In this way, the dimming according to the presence or not of the distance information may be accomplished.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15815478A JPS5587131A (en) | 1978-12-23 | 1978-12-23 | Dimming system of electronic flash |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15815478A JPS5587131A (en) | 1978-12-23 | 1978-12-23 | Dimming system of electronic flash |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5587131A true JPS5587131A (en) | 1980-07-01 |
JPH0253770B2 JPH0253770B2 (en) | 1990-11-19 |
Family
ID=15665436
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15815478A Granted JPS5587131A (en) | 1978-12-23 | 1978-12-23 | Dimming system of electronic flash |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5587131A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5988722A (en) * | 1982-11-12 | 1984-05-22 | Minolta Camera Co Ltd | Flashing device |
JPS59114526A (en) * | 1982-12-21 | 1984-07-02 | Minolta Camera Co Ltd | Stroboscopic device |
JPS59189332A (en) * | 1983-04-13 | 1984-10-26 | Ricoh Co Ltd | Electronic flash device |
JPS59191022A (en) * | 1983-04-14 | 1984-10-30 | Ricoh Co Ltd | Stroboscope photographing system |
JPS602929A (en) * | 1983-06-17 | 1985-01-09 | Minolta Camera Co Ltd | Flash photographing device |
JPS6012534A (en) * | 1983-07-02 | 1985-01-22 | Ricoh Co Ltd | Dimming control device of auto stroboscope |
JPS60163028A (en) * | 1984-02-04 | 1985-08-24 | Ricoh Co Ltd | Electronic flash device |
JPS60163029A (en) * | 1984-02-04 | 1985-08-24 | Ricoh Co Ltd | Electronic flash photographing system |
JPH01302239A (en) * | 1988-12-16 | 1989-12-06 | Minolta Camera Co Ltd | Flash device having data transmitting function |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4823093U (en) * | 1971-07-23 | 1973-03-16 | ||
JPS54158923A (en) * | 1978-06-06 | 1979-12-15 | Mamiya Camera | Exposure amount control system for electronic flashing mode of camera |
-
1978
- 1978-12-23 JP JP15815478A patent/JPS5587131A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4823093U (en) * | 1971-07-23 | 1973-03-16 | ||
JPS54158923A (en) * | 1978-06-06 | 1979-12-15 | Mamiya Camera | Exposure amount control system for electronic flashing mode of camera |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5988722A (en) * | 1982-11-12 | 1984-05-22 | Minolta Camera Co Ltd | Flashing device |
JPS59114526A (en) * | 1982-12-21 | 1984-07-02 | Minolta Camera Co Ltd | Stroboscopic device |
JPS59189332A (en) * | 1983-04-13 | 1984-10-26 | Ricoh Co Ltd | Electronic flash device |
JPS59191022A (en) * | 1983-04-14 | 1984-10-30 | Ricoh Co Ltd | Stroboscope photographing system |
JPS602929A (en) * | 1983-06-17 | 1985-01-09 | Minolta Camera Co Ltd | Flash photographing device |
JPS6012534A (en) * | 1983-07-02 | 1985-01-22 | Ricoh Co Ltd | Dimming control device of auto stroboscope |
JPH0527844B2 (en) * | 1983-07-02 | 1993-04-22 | Ricoh Kk | |
JPS60163028A (en) * | 1984-02-04 | 1985-08-24 | Ricoh Co Ltd | Electronic flash device |
JPS60163029A (en) * | 1984-02-04 | 1985-08-24 | Ricoh Co Ltd | Electronic flash photographing system |
JPH01302239A (en) * | 1988-12-16 | 1989-12-06 | Minolta Camera Co Ltd | Flash device having data transmitting function |
Also Published As
Publication number | Publication date |
---|---|
JPH0253770B2 (en) | 1990-11-19 |
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