Patent ID: 7443604

Claim:
A zoom lens comprising: a first lens group with negative refractive power; a second lens group with positive refractive power; an aperture stop; and at least one trailing lens group, which are arranged from an object side to an image side in that order, wherein the space between the first lens group and the second lens group is changed during zooming, and the second lens group includes a second A lens component composed of a single positive lens, and a second B lens component composed of a negative lens and a positive lens with positive refractive power as a whole, which are arranged from the object side to the image side in that order, the second A lens component displacing images in a direction substantially perpendicular to an optical axis by having a component of it's displacement perpendicular to the optical axis, and wherein the zoom lens satisfies the following conditions: 0.2 <f 2/ f 2 A< 0.6 0.4 <LP/fw< 1.0, where f2A and f2 are the focal lengths of the second A lens component and the second lens group, respectively; LP is the distance along the optical axis between the lens surface closest to the image side of the second A lens component and the aperture stop; and fw is the focal length of the entire system at the wide angle end.