Automatic exposure control apparatus for camera

Details Automatic exposure control apparatus for camera Automatic exposure control apparatus for camera

1982-01-22

1984-03-20

Gellner, Michael L.

354412, G03B 7097

Patent

active

044377444

ABSTRACT:
Aperture-priority, shutter-priority, and programmed automatic exposure modes may be selected, with or without automatic focus control. For certain types of operation, the diaphragm value of a photographic lens is set to a value between maximum and minimum diaphragm values in response to measurement of the luminance value of an object, and when the set diaphragm value is smaller than a predetermined diaphragm value at which the lens has a predetermined depth of focus, the diaphragm is adjusted to the predetermined diaphragm value, and the shutter time (speed) is adjusted accordingly to provide a proper exposure.

REFERENCES:
patent: 4213682 (1980-07-01), Yamada
patent: 4264810 (1981-04-01), Utagawa et al.

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