Patent ID: 7277233

Claim:
A zoom lens comprising, in order from an object side to an image side thereof, a first lens unit of negative refracting power, and a second lens unit of positive refracting power, with a space between both the lens units varied for zooming, wherein: the first lens unit consists of, in order from an object side thereof, one negative lens L 11 and one positive lens L 12 , and satisfies the following conditions: 1.6800<n d1 <2.3000 (1) 1.7000<n d2 <2.3000 (2) 30.0<ν d2 <50.0 (3) 0.0 <n d2 −n d1 <0.5 (4) where ν d2 is an Abbe constant of the positive lens in the first lens unit, n d1 is a refractive index of the negative lens in the first lens unit, and n d2 is a refracting index of the positive lens in the first lens unit.