Camera system operable by carrying data from a camera accessory

Details Camera system operable by carrying data from a camera accessory Camera system operable by carrying data from a camera accessory

1987-12-09

1989-02-07

Perkey, W. B.

354423, 354442, 354455, 354286, G03B 7095, G03B 720

Patent

active

048035092

ABSTRACT:
A camera system operable with data carried from a camera accessory to a camera body. The camera accessory has a ROM for storing various data at a plurality of addresses, respectively, each of which data consists of a plurality of bits, and a coupling terminal for receiving a train of clock pulses from the camera body. A circuit is also provided for sequentially designating the address of the ROM one by one to permit the ROM to output a data stored at the designated address. In the circuit, an address signal is formed in response to the clock pulses, received through the coupling terminal, for designating an address. The data derived from the ROM are transmitted to the camera body. The camera system can operate under different modes of exposure control and can identify the attachments of accessories as to their capacity to be responsive to different forms of exposure control systems, particularly when the attachment will either permit or prevent control of an aperture value from the camera body.

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