JPS54160232A - Photographic apparatus - Google Patents
Photographic apparatusInfo
- Publication number
- JPS54160232A JPS54160232A JP6909078A JP6909078A JPS54160232A JP S54160232 A JPS54160232 A JP S54160232A JP 6909078 A JP6909078 A JP 6909078A JP 6909078 A JP6909078 A JP 6909078A JP S54160232 A JPS54160232 A JP S54160232A
- Authority
- JP
- Japan
- Prior art keywords
- magnification
- time
- light
- photographing
- emission
- 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
Landscapes
- Exposure Control For Cameras (AREA)
- Stroboscope Apparatuses (AREA)
- Eye Examination Apparatus (AREA)
Abstract
PURPOSE: To save labor for exposure condition adjustment at the changing of photographing magnifications, make observation and photographing accurate and achieve their efficiency by defining the quantity of light of the lighting source of a light system by the signals by a magnification detecting means and lead-in means.
CONSTITUTION: When a focusing lens 3a is focussed at the eye fundus Ef by moving the same and a release is operated after suitably selecting the magnification of a rear lens group 3, then a xenon tube 14 emits light. The emission of this time changes with the time t and is nearly proportional to the current I flowing in the xenon tube 14, thus assuming the waveform as shown in the figure. This emission time is stopped by the time t0 corresponding to the photographing magnification by the action of a rotary type variable resistor VR for detecting magnifications, whereby the quantity of light to the film is controlled. In addition, the emission intensity of the lamp 11 also changes with the change in the magnification of the lens group 3 and therefore the visual field of always constant brightness may be observed through the finder.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6909078A JPS54160232A (en) | 1978-06-08 | 1978-06-08 | Photographic apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6909078A JPS54160232A (en) | 1978-06-08 | 1978-06-08 | Photographic apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS54160232A true JPS54160232A (en) | 1979-12-18 |
Family
ID=13392539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6909078A Pending JPS54160232A (en) | 1978-06-08 | 1978-06-08 | Photographic apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54160232A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57211113A (en) * | 1981-06-23 | 1982-12-24 | Olympus Optical Co Ltd | Endoscope |
| JPS5875534A (en) * | 1981-10-30 | 1983-05-07 | 興和株式会社 | Controller of eye bottom camera |
| JPS6052832A (en) * | 1983-09-01 | 1985-03-26 | Canon Inc | Flash device with change-over of irradiating angle |
| JPS63182636A (en) * | 1987-01-23 | 1988-07-27 | Fuji Photo Optical Co Ltd | Varying device for irradiating angle of zoom electronic flash |
| US5754276A (en) * | 1993-11-02 | 1998-05-19 | Canon Kabushiki Kaisha | Exposure control for a reader-printer projection apparatus |
-
1978
- 1978-06-08 JP JP6909078A patent/JPS54160232A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57211113A (en) * | 1981-06-23 | 1982-12-24 | Olympus Optical Co Ltd | Endoscope |
| JPH0136602B2 (en) * | 1981-06-23 | 1989-08-01 | Olympus Optical Co | |
| JPS5875534A (en) * | 1981-10-30 | 1983-05-07 | 興和株式会社 | Controller of eye bottom camera |
| JPS6052832A (en) * | 1983-09-01 | 1985-03-26 | Canon Inc | Flash device with change-over of irradiating angle |
| JPS63182636A (en) * | 1987-01-23 | 1988-07-27 | Fuji Photo Optical Co Ltd | Varying device for irradiating angle of zoom electronic flash |
| US5754276A (en) * | 1993-11-02 | 1998-05-19 | Canon Kabushiki Kaisha | Exposure control for a reader-printer projection apparatus |
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