Camera system

Details Camera system Camera system

1991-07-26

1992-12-08

Perkey, W. B.

G03B 1336

Patent

active

051702037

ABSTRACT:
A camera system is provided which includes a camera body having a body microcomputer and an interchangeable photographing lens having a lens microcomputer that is connected to the body microcomputer to effect data communication therebetween. The body microcomputer includes an AF controller for performing auto focus control, and an F-number transmitting device for transmitting a permission F-number set in the camera body to the lens microcomputer so as to effect the auto focus control in accordance with the AF controller. The lens microcomputer includes an arithmetic operation device for calculating an open F-number at an optional focal length, a comparator for comparing the permission F-number transmitted by the F-number transmitting device with the open F-number calculated by the arithmetic operation device, and a judgment data setting device for setting AF judgment data which determines the permission of the auto focus control in accordance with the detection result of the comparator.

REFERENCES:
patent: 4477164 (1984-10-01), Nakai et al.
patent: 4509842 (1985-04-01), Taniguchi et al.
patent: 4560267 (1985-12-01), Nakai et al.
patent: 4602861 (1986-07-01), Taniguchi et al.
patent: 4673275 (1987-06-01), Nakai et al.
patent: 5036349 (1991-07-01), Suzuki et al.

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