Viewfinder dioptry adjusting device for single-lens reflex camer

Details Viewfinder dioptry adjusting device for single-lens reflex camer Viewfinder dioptry adjusting device for single-lens reflex camer

1979-08-20

1981-05-19

Griffin, Donald A.

G03B 1306

Patent

active

042681510

ABSTRACT:
A dioptry adjusting mechanism for an eyepiece of a viewfinder for a single lens reflex camera in which the eyepiece includes a negative lens element movable along the optical axis of the view finder for the dioptry adjustment and a stationary positive lens element located at the eye side of the negative lens element, the mechanism including a lever rotatable in response to a manual operation to displace the negative lens element translationally, with a guide member guiding the lens. A manual member for the adjustment may be disposed somewhat remote from the lenses.

REFERENCES:
patent: 2172339 (1939-09-01), Mihalyi
patent: 2529944 (1950-11-01), Houck
patent: 2755701 (1956-07-01), Altman
patent: 3845699 (1974-11-01), Feng
patent: 4164369 (1979-08-01), Urano et al.
Leica Photography, 1957, No. 2, vol. 10, p. 31, Leica 111G.

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