Zoom lens system and imaging apparatus having the same

Details Zoom lens system and imaging apparatus having the same Zoom lens system and imaging apparatus having the same

2006-06-27

2006-06-27

Nguyen, Thong Q (Department: 2872)

Optical: systems and elements

Image stabilization

By movable refractive structure

C359S554000, C359S676000

Reexamination Certificate

active

07068428

ABSTRACT:
A zoom lens system includes a front lens group and a rear lens group arranged from an object side to an image side in that order. The front lens group includes a plurality of lens units, and during zooming from a wide angle end to a telephoto end, imaging magnification is increased by changing spaces between the plurality of lens units. The rear lens group with positive optical power as a whole includes a lens unit IS with negative optical power being movable so as to have a direction perpendicular to an optical axis, and a lens component RB2with positive optical power disposed on the image side with respect to the lens unit IS. A space between the lens unit IS and the lens component RB2is changed during zooming. The following condition is established to satisfy:in-line-formulae description="In-line Formulae" end="lead"?0.05<|fis|/ft<0.25,in-line-formulae description="In-line Formulae" end="tail"?wherein (fis) denotes a focal distance of the lens unit IS, and (ft) denotes a focal distance at the telephoto end of the zooming lens system.

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