Patent ID: 8537471

Claim:
A zoom lens system having a plurality of lens units, each lens unit being composed of at least one lens element, the zoom lens system, in order from an object side to an image side, comprising: a front unit; and a rear unit, wherein the rear unit, in order from the object side to the image side, comprises: a subsequent first lens unit; and a subsequent second lens unit having negative optical power and being a focusing lens unit which moves along an optical axis at the time of focusing from an infinity in-focus condition to a close-object in-focus condition, the subsequent first lens unit comprises: a first-N sub lens unit having negative optical power; and a first-P sub lens unit having positive optical power, and the first-N sub lens unit or the first-P sub lens unit is an image blur compensating lens unit which moves in a direction perpendicular to the optical axis in order to optically compensate image blur.