Patent ID: 7652827

Claim:
A zoom lens that includes a first lens group having negative refractive power and a second lens group having positive refractive power that are sequentially arranged from a subject side, and changes a focal length by changing a distance between the first lens group and the second lens group, wherein the second lens group includes, sequentially arranged from the subject side, a first lens that has positive refractive power and a convex surface facing toward the subject side, a second lens that has positive refractive power, an aspheric surface, and a convex surface facing toward the subject side, a third lens having negative refractive power, a fourth lens having positive refractive power, and a fifth lens including one lens or more having positive refractive power, the third lens and the fourth lens are connected, and the zoom lens satisfies following conditions, Nd 21 >1.8 νd 24 >80 where Nd 21 is a refractive index of the first lens of the second lens group at a d-line, and νd 24 is an Abbe number of the fourth lens of the second lens group at a d-line.