Zoom lens system with movable diaphragm

Details Zoom lens system with movable diaphragm Zoom lens system with movable diaphragm

1979-07-05

1981-11-10

Clark, Conrad J.

350450, G02B 1514

Patent

active

042994535

ABSTRACT:
The present invention relates to an objective lens for zooming by varying the distance between the divergent front lens group and the convergent rear lens group consisting of a first sub-group for forming a convergent light beam and a second sub-group between which sub-groups a photographing aperture is provided so as to be independent from them, whereby when the rear lens group is displaced forward for zooming the photographing aperture is displaced backward with reference to the first sub-group.

REFERENCES:
patent: 4185893 (1980-01-01), Ogawa
patent: 4190323 (1980-02-01), Ogawa

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