Patent ID: 7692872

Claim:
A zoom lens, comprising, in order from an object side thereof, a first lens group of positive refracting power, and a second lens group of negative refracting power, and a third lens group of positive refracting power located on an image side with respect to said second lens group, wherein: upon zooming from a wide-angle end to a telephoto end, a spacing between said first lens group and said second lens group grows wider at the telephoto end than at the wide-angle end, a spacing between said second lens group and said third lens group becomes narrower at the telephoto end than at the wide-angle end, and wherein: said first lens group comprises a negative lens and a positive lens, a total number of the negative lens in said first lens group is one, and at least one positive lens in said first lens group satisfies the following conditions (1) and (2): 1.80<ndlp<2.0 (1) 50.0<νdlp<70.0 (2) where ndlp is a d-line refractive index of said at least one positive lens in the first lens group, and νdlp is an Abbe constant of said at least one positive lens in the first lens group.