Focus condition indicating system for use in a camera

Details Focus condition indicating system for use in a camera Focus condition indicating system for use in a camera

1981-01-23

1982-11-30

Adams, Russell E.

354 25, 354289, G03B 300, G03B 1318

Patent

active

043613900

ABSTRACT:
A focus condition indicating system for use in a camera includes a control signal producer provided in association with an objective lens of the camera for producing a control signal when the objective lens moves past a proper focus position and a sound producer for producing a sound signal upon receipt of the control signal.

REFERENCES:
patent: 3743416 (1973-07-01), Widmer et al.
patent: 4251145 (1981-02-01), Cocron et al.
patent: 4272176 (1981-06-01), Maitani et al.

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