Output device for range information for use in an interchangeabl

Details Output device for range information for use in an interchangeabl Output device for range information for use in an interchangeabl

1986-04-15

1989-08-15

Perkey, W. B.

354412, 354421, 3541951, 35419513, 3542891, G03B 300, G03B 1505, G03B 1718

Patent

active

048579513

ABSTRACT:
An output device for range information for use in an interchangeable lens includes a range ring of the interchangeable lens which is first preset at an extreme position, namely, a position at infinity or at close range, and a CPU disposed in the interchangeable lens for producing absolute range information relative to the extreme position on the basis of pulses which are generated in response to data stored in the CPU and rotating of the range ring. A camera system includes rotatable and manually operable operating members which are located on a camera accessory. Rotation of the operating members results in the generation of pulses and the rotation detection device uses the pulses for detecting rotation of the operating members. An output from the detecting means serves to control a motor drive to focus an interchangeable lens.

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