System for communication between camera and accessory

Details System for communication between camera and accessory System for communication between camera and accessory

1997-04-28

1998-07-14

Perkey, W. B.

Photography

Camera detail

Lens mount

396544, G03B 1714

Patent

active

057818185

ABSTRACT:
In a camera system arranged to communicate data between a camera and an accessory mounted on the camera in synchronism with a clock signal, the lens communicates data to the camera by a first communication method (an open drain method), and, if it is determined as a result of the data communication that the lens mounted on the camera is a lens suited for high-speed communication, the first communication method is switched to a second communication method suited for high-speed communication, so that communication can be performed at a high speed.

REFERENCES:
patent: 4734732 (1988-03-01), Nishio et al.
patent: 4845522 (1989-07-01), Kataoka
patent: 4860113 (1989-08-01), Miyamoto et al.
patent: 4942413 (1990-07-01), Saegusa et al.
patent: 5223877 (1993-06-01), Kawasaki et al.
European Search Report dated Sep. 26, 1997.

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