High speed wide angle objective lens system

Details High speed wide angle objective lens system High speed wide angle objective lens system

1976-03-29

1977-05-24

Corbin, John K.

350214, G02B 1304

Patent

active

040251691

ABSTRACT:
An extremely high speed wide angle objective lens system, wherein a reducing Newtonian finder telescope is arranged in front of an objective lens group which produces a real image on an image plane. Rules or conditions are stated, and several specific examples are given. In many of the examples, the back focus distance is relatively large, thus making the lens system suitable for use with a mirror reflex camera where room is needed for swinging the reflex mirror.

REFERENCES:
patent: 3736049 (1973-05-01), Shimizu

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