Patent ID: 7154680

Claim:
A zoom lens, including, in order from an object side thereof, a first lens group having positive power, a second lens group having negative power, a third lens group having positive power and a fourth lens group having positive power, and comprising five lens groups in all, wherein: said first lens group comprises, in order from an object side thereof, a negative lens component, an optical path-bending optical member and a positive lens component, wherein, upon zooming from a wide-angle end to a telephoto end of said zoom lens, said first lens group remains substantially fixed with respect to an image plane, said second lens group moves only toward an image side of said zoom lens, and said fourth lens group moves in such a way as to be positioned nearer to the object side at the telephoto end than at the wide-angle end, and which satisfies the following condition (1): 0.8<| f 2 /f w |1<4.0 (1) where f 2 is a focal length of the second lens group, and f w is a focal length of the zoom lens at the wide-angle end.