Camera with automatic exposure control system

Details Camera with automatic exposure control system Camera with automatic exposure control system

1976-12-20

1978-08-01

Hix, L. T.

354 60L, G03B 708

Patent

active

041046552

ABSTRACT:
A camera having means for manually preselecting the value of one of the two main exposure factors (shutter speed and diaphragm aperture) and means for automatically setting the other of these two exposure factors, in response to prevailing light conditions. If the available range of the automatically set factor is not sufficient to provide an acceptable exposure value in view of prevailing light conditions, then the automatic mechanism moves the previously selected or preset exposure factor to a value which will give an acceptable exposure value. Relatively simple and inexpensive circuitry is provided to accomplish this, and to enable the exposure values to be set entirely manually rather than automatically, if desired.

REFERENCES:
patent: 4011569 (1977-03-01), Mashimo et al.
patent: 4015198 (1977-03-01), Iwashita et al.

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