Diopter adjustable eyepiece used for view-finders of single-lens

Details Diopter adjustable eyepiece used for view-finders of single-lens Diopter adjustable eyepiece used for view-finders of single-lens

1982-03-05

1985-04-09

Corbin, John K.

G02B 300, G02B 2500

Patent

active

045098310

ABSTRACT:
An eyepiece used for view-finders of single-lens reflex cameras or the like comprising, as arranged in turn from the object side, a first lens component of a power negative as a whole and a second lens component of a power positive as a whole, either of the first lens component and second lens component being moved along the optical axis or both of them being moved along the optical axis in the respective directions reverse to each other in order that the movements of the lens components for adjusting the diopter may be small and the variations of various aberrations with the movements of the lens components may be small.

REFERENCES:
patent: 2662443 (1953-12-01), Loeck
patent: 4217048 (1980-08-01), Egawa

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