Compact wide-angle close-focus SLR zoom lens

Details Compact wide-angle close-focus SLR zoom lens Compact wide-angle close-focus SLR zoom lens

1988-05-27

1989-04-04

Corbin, John K.

350426, 354201, G02B 1514, G02B 2700, G02B 962

Patent

active

048180823

ABSTRACT:
A wide-angle close-focus zoom lens for a single lens reflex camera, said lens having no more than a total of three independent movable lens element units or sub-units. The lens can have as few as eight lens elements without requiring any aspheric lens element surfaces.

REFERENCES:
patent: 4304466 (1981-12-01), Betensky
patent: 4586793 (1986-05-01), Tanaka et al.
patent: 4607918 (1986-08-01), Ogata
patent: 4756609 (1988-07-01), Estelle
patent: 4757372 (1988-07-01), Betensky et al.

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