Viewfinder optical system compensated in macrophotographic or pa

Details Viewfinder optical system compensated in macrophotographic or pa Viewfinder optical system compensated in macrophotographic or pa

1990-05-24

1992-05-26

Perkey, W. B.

Optical: systems and elements

Prism

With reflecting surface

354164, 35419512, 359705, G03B 1310

Patent

active

051172470

ABSTRACT:
A viewfinder optical system, separate from a photographing optical system, for picture taking. The viewfinder optical system includes an objective lens, an eyepiece, and a compensation lens. The compensation lens is capable of being positioned in an optical path of the viewfinder optical system at object distances closer than a predetermined distance for simultaneously compensating for any variance in parallax and diopter between the viewfinder optical system and the photographing optical system in the macro mode.

REFERENCES:
patent: 4287564 (1981-09-01), Swift et al.
patent: 4940030 (1990-07-01), Haraguchi

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