JPS5584928A - Electric shutter equipped with shutter speed display device - Google Patents
Electric shutter equipped with shutter speed display deviceInfo
- Publication number
- JPS5584928A JPS5584928A JP6426979A JP6426979A JPS5584928A JP S5584928 A JPS5584928 A JP S5584928A JP 6426979 A JP6426979 A JP 6426979A JP 6426979 A JP6426979 A JP 6426979A JP S5584928 A JPS5584928 A JP S5584928A
- Authority
- JP
- Japan
- Prior art keywords
- current
- ammeter
- transistor
- shutter speed
- shutter
- 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)
- Indication In Cameras, And Counting Of Exposures (AREA)
Abstract
PURPOSE: To enable display of shutter speed and battery check function simultaneously, by connecting a display part to an external light illumination memory circuit and providing a battery check circuit to disable the display part when the supply voltage drops.
CONSTITUTION: The brightness of an object is converted to an electric signal by means of Cds 5, and is amplified by an amplifier 12. This output is applied to a transistor 9, and a current I0 flows into the collector thereof. This current I0 is changed to a collector current I0' by a transistor 15 to charge a capacitor 13. Also, the current I0' flows into an ammeter 33, and the indication of the ammeter 33 displays the shutter speed. When the voltage of a power source 1 drops, a transistor 26 is cut off, so that the ammeter 33 does not operate, showing that the power source 1 cannot be used. Therefore, the battery may be always checked.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6426979A JPS5584928A (en) | 1979-05-23 | 1979-05-23 | Electric shutter equipped with shutter speed display device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6426979A JPS5584928A (en) | 1979-05-23 | 1979-05-23 | Electric shutter equipped with shutter speed display device |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP49093221A Division JPS5121137A (en) | 1974-08-16 | 1974-08-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5584928A true JPS5584928A (en) | 1980-06-26 |
Family
ID=13253307
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6426979A Pending JPS5584928A (en) | 1979-05-23 | 1979-05-23 | Electric shutter equipped with shutter speed display device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5584928A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4835383B1 (en) * | 1969-08-19 | 1973-10-27 |
-
1979
- 1979-05-23 JP JP6426979A patent/JPS5584928A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4835383B1 (en) * | 1969-08-19 | 1973-10-27 |
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