Patent ID: 8314996

Claim:
A zoom lens comprising, in order from an object side to an image side: a first lens unit having a positive refractive power; a second lens unit having a negative refractive power; a third lens unit having the positive refractive power; and a rear group including at least one lens unit, wherein with respect to a wide angle end, at a telephoto end, an interval between the first lens unit and the second lens unit increases, an interval between the second lens unit and the third lens unit decreases, and an interval between the third lens unit and the rear group changes, wherein the first lens unit includes two positive lenses and one negative lens, and the second lens unit includes a negative lens and a positive lens, and wherein the following conditional expressions are satisfied: 80.0<ν1 p; 1.0 <f 1 p/f 1<1.6; ν2 p< 18.4; 1.90 <N 2 p ; and −6.5 <M 1 /fw<− 4.0, where ν1p denotes an Abbe number of a material of one of the two positive lenses constituting the first lens unit that has a largest Abbe number, N2p and ν2p denote a refractive index and an Abbe number of a material of the positive lens of the second lens unit, respectively, f1 denotes a focal length of the first lens unit, f1p denotes a focal length of the one of the two positive lenses constituting the first lens unit that has the largest Abbe number, M1 denotes a movement amount of the first lens unit during zooming from the wide angle end to the telephoto end, and fw denotes a focal length of the entire system of the zoom lens at the wide angle end.