Patent ID: 7342727

Claim:
A zoom lens comprising, in the following order from an object side: a first lens group including negative refractive power; a second lens group including negative refractive power; and a third lens group; wherein at least the second lens group and the third lens group are movable along an optical axis to perform a zooming action; wherein the second lens group is movable in a direction orthogonal to the optical axis to shift an image in a direction orthogonal to the optical axis; wherein following conditional formulae (1) and (2) are satisfied: 0.5<(1−βα)×β b< 1.0, and (1) 0.1<| f 1/ f 2|<1.25, where (2) βα: magnification of the second lens group at a telephoto end of the zoom lens; βb: magnification of a lens group on an image side relative to the second lens group; f1: focal length of the first lens group; and f2: focal length of the second lens group.