Means for controlling an interchangeable lens type camera

Details Means for controlling an interchangeable lens type camera Means for controlling an interchangeable lens type camera

1982-03-08

1984-01-17

Perkey, William B.

G03B 1700

Patent

active

044261470

ABSTRACT:
A camera is provided with a series of interchangeable lenses each provided with a source of information preferably in the form of a variable resistor, which is indicative of the type of lens. The camera body is provided with a source of power and an information processing unit. The variable resistor in each lens is connected to the camera body through an electrical contact and provides information to the camera not only of the type of lens attached, through a stepped range of voltages, but secondary information variable according to focal length, etc. in increments smaller than the individual steps in the voltage range.

REFERENCES:
patent: Re29276 (1977-06-01), Mitani et al.
patent: 3849785 (1974-11-01), Schulze
patent: 4080531 (1978-03-01), Stauffer
patent: 4196997 (1980-04-01), Ohmori et al.

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