Apparatus for communicating information relating to taking lens

Details Apparatus for communicating information relating to taking lens Apparatus for communicating information relating to taking lens

1981-10-19

1984-02-21

Adams, Russell E.

Electrical resistors

Incased, embedded, or housed

Element in insulation with outer metallic sheath

338 32R, 354286, G03B 1700

Patent

active

044326270

ABSTRACT:
An apparatus for communicating information relating to taking lens comprises a magneto-electric transducer element disposed on a camera body adjacent to a lens mount thereof, and a magnet disposed on the rear end of a lens barrel which receives an interchangeable lens. The magnet produces a magnetic effect upon the transducer element of a magnitude which depends on the value of functional information of each interchangeable lens.

REFERENCES:
patent: 3590134 (1971-06-01), Ogi
patent: 3928858 (1975-12-01), Sakurada et al.
patent: 4104649 (1978-08-01), Tanaka et al.
patent: 4118713 (1978-10-01), Murakami et al.
patent: 4196997 (1980-04-01), Onmori et al.
patent: 4275953 (1981-06-01), Watanobe et al.
patent: 4360255 (1982-11-01), Kawasaki

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