Real image mode finder optical system

Details Real image mode finder optical system Real image mode finder optical system

1998-06-30

2000-03-28

Perkey, W.B.

Photography

Having camera indicator

Having display in viewfinder

396378, G03B 1310

Patent

active

060442298

ABSTRACT:
A real image mode finder optical system includes a field frame switching device interposed between an objective system and an ocular system. An indication part of a field frame inserted by the field frame switching device is placed on the objective side of an intermediate image plane of the real image mode finder optical system. In this way, the finder optical system in which adhesion of dirt is inconspicuous and the view of the visual field of the finder is good can be obtained.

REFERENCES:
patent: 5771416 (1998-06-01), Mukai et al.

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