Automatic focusing cameras

Details Automatic focusing cameras Automatic focusing cameras

1988-02-17

1989-03-28

Adams, Russell E.

354402, 3541951, G03B 300

Patent

active

048168580

ABSTRACT:
An automatic focusing camera, after determining composition of an object being photographed within a range finding frame disposed at the center of a finder, repeats operations of detecting a range difference between an image forming position and a predetermined focusing position of the object and of storing the detected range difference, before a shutter release button is half-depressed, and, after being half-depressed, drives a taking lens in accordance with a range difference based on the latest information stored immediately before the half-depression to stop the taking lens at the predetermined focusing position, thereby enabling the lens setting without a time lag even when the object being photographed is in a low brightness.

REFERENCES:
patent: 4295715 (1981-10-01), Breen
patent: 4474447 (1984-10-01), Kawabata et al.
patent: 4557577 (1985-12-01), Shinoda
patent: 4702584 (1987-10-01), Taniguchi et al.
patent: 4730201 (1988-03-01), Sasagaki

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