Wide angle photographic lens

Details Wide angle photographic lens Wide angle photographic lens

1977-02-04

1978-07-11

Clark, Conrad J.

G02B 960

Patent

active

040998509

ABSTRACT:
A wide angle photographic lens system comprises, in the order from the object side, a first lens component which is a positive lens having its more convex surface facing the object side, a second lens component which is a negative meniscus lens having its convex surface facing the object side, a third lens component which is a biconvex lens having its more convex surface facing the object side, a diaphragm, a fourth lens component which is a biconcave lens, a fifth lens component which is a positive meniscus lens having its convex surface facing the image side, and a sixth lens component which is a biconvex lens. Four distinctive optical conditions are characteristic of the lens system.

REFERENCES:
patent: 3955883 (1976-05-01), Sugiyama

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