Autofocusing system for a camera

Details Autofocusing system for a camera Autofocusing system for a camera

1989-09-29

1991-11-19

Brown, Brian W.

35419512, G03B 1300

Patent

active

050669680

ABSTRACT:
An autofocusing system for a camera having a photographic lens including a focusing lens group and a zooming lens group, and a focus-lock means for inhibiting the driving of the focusing lens group once the photographic lens is brought into an in-focus condition. However, when the zooming lens group is thereafter driven, a re-focusing operation, or focus-correction operation, is executed.

REFERENCES:
patent: 3972056 (1976-07-01), Tsujimoto
patent: 4509842 (1985-04-01), Taniguchi et al.
patent: 4560267 (1985-12-01), Nakai et al.
patent: 4623238 (1986-11-01), Taniguchi et al.
patent: 4885600 (1989-12-01), Iwasa et al.

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