Shutter time adjustment for a flash mode and/or film-leader loca

Details Shutter time adjustment for a flash mode and/or film-leader loca Shutter time adjustment for a flash mode and/or film-leader loca

1980-02-15

1981-11-24

Hix, L. T.

354 38, 354 50, 354215, G03B 700, G03B 962

Patent

active

043020852

ABSTRACT:
In a photographic camera comprising an exposure time control circuit for controlling the shutter speed in response to the brightness of the object and a film frame number indicating device capable of indicating a usable range for frames allowing photographing operation and a non-usable range for frames not allowing photographing operation, wherein the shutter being controlled to a shutter speed independent from the shutter speed determined by said exposure time control circuit when said indicating device indicates said non-usable range, an improvement comprises a second exposure time control circuit for controlling the shutter with a shutter speed suitable for flash photographing and switch means for selecting the shutter speed control by the aforementioned exposure time control circuit or by said second exposure time control circuit in response to the indication of said indicating device in such a manner that the shutter is controlled by the shutter speed determined by said second exposure time control circuit when said indicating device indicates said non-usable range.

REFERENCES:
patent: 4096492 (1978-06-01), Land

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