Patent ID: 8432615

Claim:
An image taking apparatus, comprising: a zoom lens; and a solid-state image pickup element for picking up an image formed by the zoom lens, wherein the zoom lens comprises, in order from an object side to an image side: a first lens unit having a negative refractive power; a second lens unit having a positive refractive power; and a third lens unit having a positive refractive power, the first lens unit, the second lens unit and the third lens unit moving so as to change intervals among the first lens unit, the second lens unit and the third lens unit during zooming, wherein the first lens unit comprises, in order from the object side to the image side: a lens 1 a having a negative power; and a lens 1 b having a positive power, wherein the second lens unit comprises, in order from the object side to the image side: a lens 2 a having a positive power; a cemented lens in which a lens 2 b having a positive power and a lens 2 c having a negative power are cemented; and a lens 2 d having a positive power, and wherein the following conditional expressions are satisfied: 4.0<( n 2 c×ft )/( R 2 cr×Fnow )<6.0; and 71< n 2 c×ωW< 97, where R 2 cr denotes a curvature radius of an image-side lens surface of the lens 2 c , n 2 c denotes a refractive index of a material of the lens 2 c , ft denotes a focal length of an entire system at a telephoto end, Fnow denotes an F-number at a wide-angle end, and ωW (degrees) denotes a half angle of field at the wide-angle end.