Retrofocus wide-angle photographic lens system

Details Retrofocus wide-angle photographic lens system Retrofocus wide-angle photographic lens system

1982-09-30

1984-12-11

Corbin, John K.

G02B 964, G02B 1304

Patent

active

044874855

ABSTRACT:
A retrofocus wide-angle photographic lens system is composed, in order from the object size, of a first positive-meniscus lens having a convex surface directed toward the object, second and third negative-meniscus lenses having convex surfaces directed toward the object, fourth and fifth positive lenses, a sixth biconcave lens, a seventh positive lens, an eighth negative lens, and a ninth positive lens. The eighth and ninth lenses forming a doublet having a positive composite focal length.

REFERENCES:
patent: 3512874 (1970-05-01), Woltche
patent: 4382662 (1983-05-01), Tokumaru et al.

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