Retrofocus-type ultra-wide angle photographic lens system

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

1974-08-20

1976-08-24

Sacher, Paul A.

350176, G02B 964

Patent

active

039763668

ABSTRACT:
A retrofocus-type ultra-wide angle photographic lens system having a front negative lens group comprising one or two positive meniscus lenses and three or four negative meniscus lenses and satisfying the following conditions:

REFERENCES:
patent: 3512874 (1970-05-01), Woltche
patent: 3830559 (1974-08-01), Matsubara
patent: 3832037 (1974-08-01), Nakagawa

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