Photographing lens system with focus informing means

Details Photographing lens system with focus informing means Photographing lens system with focus informing means

1981-08-05

1983-02-01

Perkey, William B.

350255, G03B 300, G03B 1318, G02B 704

Patent

active

043712452

ABSTRACT:
A photographing lens, which is to be mounted on a camera in an interchangeable manner is provided with a focus-informing means, which informs the photographer of focussings of the photographing lens during manual focussing operation thereof by buzzer or by small lamp, thereby enabling to provide a semi-automatic focussing for a conventional camera body without provision of an automatic focus adjusting means.

REFERENCES:
patent: 3940777 (1982-04-01), Komine
patent: 4323303 (1982-04-01), Enomoto

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