Patent ID: 8514497

Claim:
A zoom lens comprising, in order from an object side to an image side: a first lens unit having a negative refractive power; and a second lens unit having a positive refractive power, a distance between the first lens unit and the second lens unit varying during zooming, wherein the first lens unit includes, in order from the object side to the image side, a negative lens and a positive lens of which an object-side lens surface is convex, and wherein, when an Abbe number of a material of the positive lens of the first lens unit is denoted by νd1p, a focal length of the first lens unit is denoted by f1, a distance between an image-side lens surface of the first lens unit and an object-side lens surface of the second lens unit at a telephoto end is denoted by d12t, and focal lengths of the entire zoom lens at a wide-angle end and the telephoto end are denoted by fw and ft, respectively, the following conditions are satisfied: 5.0<ν d 1 p <16.9 0.1<( d 12 t/ft )*100<5.0 1.9<| f 1|/ fw< 2.4.