Camera and viewfinder display device therefor

Details Camera and viewfinder display device therefor Camera and viewfinder display device therefor

1978-10-10

1980-10-07

Gellner, Michael L.

G03B 1718

Patent

active

042265169

ABSTRACT:
In the enclosed camera, the progress of a long time exposure is indicated by integrating a voltage over the exposure time and displaying the integrated voltage with an ammeter needle or a row of sequentially illuminated LEDs. According to an embodiment of the invention, the integrated voltage is derived from the integrator that controls the shutter exposure.

REFERENCES:
patent: 3504601 (1970-04-01), Schubert

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