Camera and photographic lens and diaphragm for starting a...

Details Camera and photographic lens and diaphragm for starting a... Camera and photographic lens and diaphragm for starting a...

2008-02-08

2010-12-14

Perkey, W. B. (Department: 2862)

Photography

With exposure objective focusing means, focusing aid, or...

Lens characteristic compensating

C396S092000, C396S509000, C348S350000

Reexamination Certificate

active

07853138

ABSTRACT:
A camera is provided which is adapted to receive a photographic lens having a diaphragm. The camera includes a detection unit configured to execute electric charge accumulation for detecting a defocus amount when the diaphragm is in a state having a first aperture value, and a controller configured to, when causing the diaphragm to perform an aperture reducing operation from the first aperture value to a second aperture value, cause the diaphragm to start the aperture reducing operation without waiting for completion of the electric charge accumulation for detecting the defocus amount by the detection unit.

REFERENCES:
patent: 5517273 (1996-05-01), Tsukada
patent: 6037980 (2000-03-01), Takeda
patent: 10-260449 (1998-09-01), None

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