JPS5794730A - Exposure control device - Google Patents
Exposure control deviceInfo
- Publication number
- JPS5794730A JPS5794730A JP10871581A JP10871581A JPS5794730A JP S5794730 A JPS5794730 A JP S5794730A JP 10871581 A JP10871581 A JP 10871581A JP 10871581 A JP10871581 A JP 10871581A JP S5794730 A JPS5794730 A JP S5794730A
- Authority
- JP
- Japan
- Prior art keywords
- pulse
- lock
- start pulse
- gate
- turned
- 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
- G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
- G03B7/08—Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device
- G03B7/091—Digital circuits
Abstract
PURPOSE:To easily perform the EE lock of a digital control single-lens reflex camera, by providing a lock signal generating circuit by which updating of a digital storage value is stopped. CONSTITUTION:A switch S1 is connected to the side (a) by depressing the first stage of a shutter button, and an AND gate AN1 is turned on by a start pulse generated from a pulse oscillator P1. As a result, a counter CC and an operating circuit LC are cleared, and a pulse of frequency being parallel to the luminance obtained from a resonance solid oscillating element F is counted by a period counter of pulse width of a reference pulse generator P2, and a photographic operation is executed by the operating circuit. It is repeated whenever a start pulse is generated, and the storage is updataed, but when an EE lock switch S0 is switched to the side (a) from the side (b), a gate AN1 is turned off, the start pulse is cut off, and the EE lock is executed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10871581A JPS5794730A (en) | 1981-07-10 | 1981-07-10 | Exposure control device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10871581A JPS5794730A (en) | 1981-07-10 | 1981-07-10 | Exposure control device |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8084074A Division JPS519444A (en) | 1974-07-15 | 1974-07-15 | ROSHUTSUSEIGYO SOCHI |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5794730A true JPS5794730A (en) | 1982-06-12 |
Family
ID=14491746
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10871581A Pending JPS5794730A (en) | 1981-07-10 | 1981-07-10 | Exposure control device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5794730A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5953821A (en) * | 1982-09-21 | 1984-03-28 | Kyocera Corp | Photometric value storage device of camera |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2127480A1 (en) * | 1970-06-04 | 1971-12-16 | Minolta Camera K K , Osaka (Japan) | Exposure control device for a photographic camera |
US3742826A (en) * | 1970-01-07 | 1973-07-03 | Canon Kk | Exposure control device |
-
1981
- 1981-07-10 JP JP10871581A patent/JPS5794730A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3742826A (en) * | 1970-01-07 | 1973-07-03 | Canon Kk | Exposure control device |
DE2127480A1 (en) * | 1970-06-04 | 1971-12-16 | Minolta Camera K K , Osaka (Japan) | Exposure control device for a photographic camera |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5953821A (en) * | 1982-09-21 | 1984-03-28 | Kyocera Corp | Photometric value storage device of camera |
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