Zoom lens system

Details Zoom lens system Zoom lens system

1997-01-21

1999-02-16

Sugarman, Scott J.

Optical: systems and elements

Lens

With variable magnification

G02B 1514

Patent

active

058726594

ABSTRACT:
A zoom lens system of the present invention comprises, from the object side, a first positive lens unit, a second negative lens unit, a third positive lens unit, a fourth positive lens unit and a fifth negative lens unit, wherein all of the lens units move toward the object during zooming from the shortest focal length condition toward the longest focal length condition, and said zoom lens system meets the following conditions.

REFERENCES:
patent: 5042927 (1991-08-01), Ogawa et al.
patent: 5185678 (1993-02-01), Arimoto
patent: 5189557 (1993-02-01), Endo
patent: 5606460 (1997-02-01), Ohtake
patent: 5666229 (1997-09-01), Ohtake

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