Wide-angle zoom lens

Details Wide-angle zoom lens Wide-angle zoom lens

1988-02-26

1989-05-09

Arnold, Bruce Y.

350426, G02B 15177, G02B 964

Patent

active

048283720

ABSTRACT:
A compact wide-angle zoom lens with short back focus comprises a forwardmost negative power lens unit movable for focusing and compensation during zooming, followed by a positive power variator lens unit comprising a forward positive power lens sub-unit movable for zooming and a rearward lens sub-unit also movable for zooming.

REFERENCES:
patent: 4304466 (1981-12-01), Betensky
patent: 4586793 (1986-05-01), Tanaka et al.
patent: 4607918 (1986-08-01), Ogata
patent: 4726667 (1988-02-01), Tachihara

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