Interchangeable finder device

Details Interchangeable finder device Interchangeable finder device

1981-09-04

1983-08-30

Adams, Russell E.

354152, 354199, 354219, G03B 708, G03B 1302

Patent

active

044013744

ABSTRACT:
An interchangeable finder device of a single lens reflex camera has a finder optical system in which a focusing screen, a pentaprism and an eyepiece are fixed in a predetermined positional relation, a casing containing the optical system therein, and a mounting-dismounting device provided on the casing to mount the casing to the camera body. The finder device further has a sliding mechanism for supporting the finder optical system slidably in a direction perpendicular to the focus surface of the focusing screen relative to the mounting-dismounting mechanism so that the finder optical system can move in said perpendicular direction independently of the mounting-dismounting device when the casing is mounted to the camera body by means of the mounting-dismounting device.

REFERENCES:
patent: 4047207 (1977-09-01), Altman et al.
patent: 4168116 (1979-09-01), Goldberg
patent: 4187016 (1980-02-01), Ishizaka

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