Adaptor for providing a digital signal indicating the full open

Details Adaptor for providing a digital signal indicating the full open Adaptor for providing a digital signal indicating the full open

1976-11-05

1978-08-01

Adams, Russell E.

354 23D, 354286, G03B 1700

Patent

active

041046498

ABSTRACT:
A device adapted for the purpose of enabling the use of presently available interchangeable photographic lenses in recently developed digitalized single lens reflex camera systems. This device is constructed in the form of an adaptor attachable to and detachable from the body of an interchangeable lens mount and capable, upon attachment to a conventional interchangeable lens, of providing information representing the full open F number of the interchangeable lens in the form of a coded digital signal. This signal is applied to a digitalized camera body associated therewith and provided, for example, with an inputting device adapted to receive the full open F number of the interchangeable lens as coded digital signal.

REFERENCES:
patent: 3777640 (1973-12-01), Holderbaum
patent: 3928858 (1975-12-01), Sakurada et al.
patent: 4006484 (1977-02-01), Nobusawa

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