Zoom lens system

Details Zoom lens system Zoom lens system

1978-05-16

1979-07-03

Sacher, Paul A.

350176, 350189, 350206, G02B 1514

Patent

active

041598652

ABSTRACT:
A zoom lens system comprising from front to rear a first lens group of negative power and a second lens group of positive power with the axial separation therebetween being variable for zooming purposes. The first lens group is provided with a non-spherical surface to achieve minimization of the overall dimensions of the complete system without causing any decrease in the extent to which the corrections of various aberrations are maintained throughout the zooming range irrespective of a great increase in the photographable range extended toward the wide angle side.

REFERENCES:
patent: 3832035 (1974-08-01), Takahashi
patent: 3848969 (1974-11-01), Tajima
patent: 3880498 (1975-04-01), Liu et al.

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