Automatic focus adjusting device for use in a camera

Details Automatic focus adjusting device for use in a camera Automatic focus adjusting device for use in a camera

1982-05-28

1983-10-11

Perkey, William B.

G03B 310

Patent

active

044088558

ABSTRACT:
An automatic focus adjusting device for a camera is provided that detects the contrast of a target object and generates an appropriate signal. If the target contrast is lower than a predetermined level the objective lens is set at an infinity focusing position. When the camera is set for flash photography it overrides any adjustment signal beyond the maximum flash photography distance.

REFERENCES:
patent: 4085320 (1978-04-01), Wilwerding
patent: 4171885 (1979-10-01), Kondo
patent: 4183643 (1980-01-01), Imura et al.
patent: 4212523 (1980-07-01), Yamada et al.
patent: 4238153 (1980-12-01), Imura

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