Finder optical system

Details Finder optical system Finder optical system

1982-01-27

1985-01-08

Corbin, John K.

350410, G02B 2500

Patent

active

044924402

ABSTRACT:
A finder optical system wherein a field mask is arranged in a position near to an eyepiece from a field lens so that a distortionless image of the field mask may be observed. The field mask can be provided directly on the peripheral side of the field lens.

REFERENCES:
patent: 1712112 (1929-05-01), Keuffel
patent: 2837969 (1958-06-01), Muller
patent: 4286844 (1981-09-01), Nagler

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