Zoom lens of rear focus type

Details Zoom lens of rear focus type Zoom lens of rear focus type

1992-05-19

1994-08-23

Sugarman, Scott J.

Optical: systems and elements

Lens

With variable magnification

359684, G02B 1514

Patent

active

053412435

ABSTRACT:
A zoom lens of the rear focus type is disclosed, comprising first, second, third and fourth lens units of positive, negative, positive and positive refractive powers in this order from the object side, zooming from the wide-angle end to the telephoto end being performed by moving the second lens unit toward the image side, compensation for the image shift and focusing being performed by moving the fourth lens unit, and the zoom lens satisfying the following conditions:

REFERENCES:
patent: 5009492 (1991-04-01), Hamano
patent: 5134524 (1992-07-01), Hamano et al.

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