Patent ID: 7061688

Claim:
A zoom lens with a vibration-proof function comprising, arranged along an optical axis in order from the object side as follows: a first lens group having negative refractive power; and a second lens group having positive refractive power; wherein the distance along the optical axis between the first lens group and the second lens group changes during zooming; the second lens group includes a first lens subgroup on its object side having positive refractive power and a second lens subgroup having positive refractive power; at least one lens surface of the first lens subgroup is an aspheric surface; the second lens subgroup is movable in a direction perpendicular to the optical axis in order to correct for vibration of the zoom lens; and the following conditions are satisfied: 0.5 <f 2F /f 2R <1.0 −0.5<β 2RT <0.2 where f 2F is the focal length of said first lens subgroup, f 2R is the focal length of said second lens subgroup, and β 2RT is the transverse magnification of said second lens subgroup at the telephoto end of the zoom range.