Wide-angle zoom lens

Details Wide-angle zoom lens Wide-angle zoom lens

1995-03-15

1998-01-20

Nelms, David

Optical: systems and elements

Lens

With variable magnification

359708, G02B 1514

Patent

active

057106690

ABSTRACT:
A zoom lens is disclosed comprising, from front to rear, a first lens unit of negative refractive power, a second lens unit of positive refractive power, a third lens unit of negative refractive power and a fourth lens unit of positive refractive power, zooming being performed by varying the separations between these lens units, and the zoom lens satisfying the following conditions:

REFERENCES:
patent: 5329401 (1994-07-01), Sato

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