Zoom lens system

Details Zoom lens system Zoom lens system

2007-09-25

2007-09-25

Thompson, Timothy (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S690000, C359S784000

Reexamination Certificate

active

11390282

ABSTRACT:
Providing a compact zoom lens system having a high zoom ratio. The zoom lens system includes, in order from an object, a first lens group G1having positive refractive power, a second lens group G2having negative refractive power, and a third lens group G3having positive refractive power. When a state of lens group positions varies from a wide-angle end state W to a telephoto end state T, at least the first lens group G1and the third lens group G3are moved along the optical axis to the object. Given conditional expressions are satisfied.

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