Retrofocus type wide angle photographic lens

Details Retrofocus type wide angle photographic lens Retrofocus type wide angle photographic lens

1979-01-09

1980-08-12

Clark, Conrad J.

G02B 1304

Patent

active

042170346

ABSTRACT:
A retrofocus type wide angle photographic lens is disclosed comprising eight lens elements grouped into eight lens components. The lens has an aperture ratio 1:2.5 and a viewing angle of 85.degree..

REFERENCES:
patent: 4062622 (1977-12-01), Sugiyama

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