Zoom lens

Details Zoom lens Zoom lens

1997-08-29

1999-01-05

Sugarman, Scott J.

Optical: systems and elements

Lens

With variable magnification

359683, G02B 1514

Patent

active

058568859

ABSTRACT:
A zoom lens comprises, in order from the object end to the image end, a positive power first lens group, a negative power second lens group, a negative power third lens group, a positive power fourth lens group and a positive power fifth lens group. The second lens group is axially movable to vary the focal length of the zoom lens, and the fifth lens group is axially movable to correct a change in position of an image formed by the zoom lens caused during zooming and a change in position of an image formed by the zoom lens due to a change in object distance. The zoom lens satisfies at least the following condition:

REFERENCES:
patent: 5136431 (1992-08-01), Terasawa et al.
patent: 5301064 (1994-04-01), Sugi et al.
patent: 5537255 (1996-07-01), Tochigi

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