Photography – Exposure control system responsive to distance
Patent
1999-05-03
2000-10-24
Perkey, W. B.
Photography
Exposure control system responsive to distance
396166, 396241, 396276, G03B 718, G03B 1503
Patent
active
061379581
ABSTRACT:
In a camera having a camera body part and a lens barrel part, an optical filter arranged to be rotatable around an axis located inside a lens optical path derived from the lens barrel part (for example, around an axis substantially parallel with an optical axis of the lens barrel part), and a filter rotating part having a drive source (for example, an electric motor) for rotating the optical filter are contained in the camera body part.
REFERENCES:
patent: 3766841 (1973-10-01), Finnegan et al.
patent: 4040067 (1977-08-01), Kondo
patent: 4937609 (1990-06-01), Wakabayashi et al.
Canon Kabushiki Kaisha
Perkey W. B.
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