Zoom lens

Details Zoom lens Zoom lens

2009-07-30

2011-12-27

Greece, James (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S676000

Reexamination Certificate

active

08085474

ABSTRACT:
A zoom lens includes, sequentially from an object side, a first lens group having a negative refractive power; and a second lens group having a positive refractive power, where focal length is varied by changing a distance between the first lens group and the second lens group, and a first conditional expression 0.8<|f1/f2|<1.0 is satisfied, f1being the focal length of the first lens group and f2being the focal length of the second lens group.

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