Wide-angle photographic objective

Details Wide-angle photographic objective Wide-angle photographic objective

1977-08-29

1980-01-15

Clark, Conrad J.

350214, G02B 1304

Patent

active

041836251

ABSTRACT:
A wide-angle photographic objective comprises, in the order from the object side, a positive meniscus lens convex to the object side, a negative meniscus lens convex to the object side, a negative meniscus lens convex to the object side, a positive lens, a negative meniscus lens convex to the object side, a positive lens, a meniscus lens convex to the image side and comprising a biconcave lens and a biconvex lens cemented together, a meniscus lens convex to the image side and comprising a biconcave lens and a biconvex lens cemented together, and a positive lens.

REFERENCES:
patent: 3572901 (1971-03-01), Mori
patent: 3832035 (1972-08-01), Takahashi
patent: 3877795 (1975-04-01), Yamashita

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