Photography – With exposure objective focusing means – focusing aid – or... – Dual purpose photoelement
Patent
1999-02-16
2000-04-18
Gray, David M.
Photography
With exposure objective focusing means, focusing aid, or...
Dual purpose photoelement
396233, 396268, 396275, 396448, G03B 1724
Patent
active
060525363
ABSTRACT:
In a camera wherein a lens cap is detachably attached there are provided first and second photometric sensors on a lens barrel and the camera main frame, respectively. It is detected in accordance with the photometric values by the first and second photometric sensors whether the lens cap is mounted. According to the camera, it is possible to detect with great accuracy whether the lens cap is mounted, with a standard type lens cap.
REFERENCES:
patent: 5666568 (1997-09-01), Saito et al.
Akiba Makoto
Arai Hiroyuki
Hamada Hisashi
Omiya Akio
Saito Tatsuo
Fuji Photo Optical Co., Ltd.
Fuji Photo Film Co. , Ltd.
Gray David M.
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