JPS57122424A - Automatic dimmer type flash device - Google Patents
Automatic dimmer type flash deviceInfo
- Publication number
- JPS57122424A JPS57122424A JP56197093A JP19709381A JPS57122424A JP S57122424 A JPS57122424 A JP S57122424A JP 56197093 A JP56197093 A JP 56197093A JP 19709381 A JP19709381 A JP 19709381A JP S57122424 A JPS57122424 A JP S57122424A
- Authority
- JP
- Japan
- Prior art keywords
- flash device
- frequency
- output
- type flash
- diaphragm
- 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
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS 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
- G03B15/00—Special procedures for taking photographs; Apparatus therefor
- G03B15/02—Illuminating scene
- G03B15/03—Combinations of cameras with lighting apparatus; Flash units
- G03B15/05—Combinations of cameras with electronic flash apparatus; Electronic flash units
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS 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
- G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
- G03B7/16—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly in accordance with both the intensity of the flash source and the distance of the flash source from the object, e.g. in accordance with the "guide number" of the flash bulb and the focusing of the camera
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Exposure Control For Cameras (AREA)
- Stroboscope Apparatuses (AREA)
Abstract
PURPOSE:To set a diaphragm automatically and also to prevent a malfunction, by sending a pulse signal of a prescribed frequency for controlling a diaphragm value of a camera, from a flash device. CONSTITUTION:An output of an oscillator provided on a flash device 1 is divided by a frequency divider 3, and the divided frequency is selected by a switch 4. A pulse signal of the selected frequency is inputted to a gate circuit 8 of a camera device 7 through a terminal 5, a pulse passes through by the gate time decided by a gate control device 9, and is counted by a counter 10. An output of the counter 10 is inputted to a converter 11, and by its output, a diaphragm control device 12 is operated.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56197093A JPS57122424A (en) | 1981-12-08 | 1981-12-08 | Automatic dimmer type flash device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56197093A JPS57122424A (en) | 1981-12-08 | 1981-12-08 | Automatic dimmer type flash device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57122424A true JPS57122424A (en) | 1982-07-30 |
Family
ID=16368604
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56197093A Pending JPS57122424A (en) | 1981-12-08 | 1981-12-08 | Automatic dimmer type flash device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57122424A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4573786A (en) * | 1983-05-27 | 1986-03-04 | Minolta Camera Kabushiki Kaisha | Flash photographing system |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5512999A (en) * | 1979-07-05 | 1980-01-29 | Canon Inc | Light adjusting flash device |
JPS5589827A (en) * | 1978-12-28 | 1980-07-07 | Ricoh Co Ltd | Shutter start control unit of camera |
-
1981
- 1981-12-08 JP JP56197093A patent/JPS57122424A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5589827A (en) * | 1978-12-28 | 1980-07-07 | Ricoh Co Ltd | Shutter start control unit of camera |
JPS5512999A (en) * | 1979-07-05 | 1980-01-29 | Canon Inc | Light adjusting flash device |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4573786A (en) * | 1983-05-27 | 1986-03-04 | Minolta Camera Kabushiki Kaisha | Flash photographing system |
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