Retro focus type wide angle lens

Details Retro focus type wide angle lens Retro focus type wide angle lens

1977-11-02

1979-10-09

Sacher, Paul A.

G02B 960

Patent

active

041704037

ABSTRACT:
A retro-focus wide angle lens which, as viewed from the object side, includes a first lens group of a single negative meniscus lens with its convex surface directed to the object side, a second lens group consisting of a single biconvex lens, a third lens group consisting of a single biconcave lens and fourth and fifth lens groups each consisting of a single positive meniscus lens having a concave surface directed to the object side.

REFERENCES:
patent: 3731989 (1973-05-01), Shimizu

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