Patent ID: 8179608

Claim:
A zoom lens comprising: a first lens unit having a positive refractive power; a second lens unit having a negative refractive power; a reflecting prism for bending an optical path; and a rear lens group including a plurality of lens units, wherein the first lens unit, the second lens unit, the reflecting prism, and the rear lens group are arranged in order from an object side to an image side, wherein at least the first and second lens units move for zooming, wherein, during retraction into a storage state, the reflecting prism moves to a position different from a position in an image taking state, and at least a part of the first lens unit and the second lens unit is retracted and stored in a space formed by the movement of the reflecting prism, and wherein the following conditions are satisfied: 0.25 <|m 1|/( DL 1 +DL 2)<0.76 0.25 <f 1/ ft< 0.55 where DL1 and DL2 represent thicknesses of the first lens unit and the second lens unit on an optical axis, respectively, m1 represents a moving amount of the first lens unit during zooming from a wide angle end to a telephoto end, f1 represents a focal length of the first lens unit, and ft represents a focal length of the entire zoom lens at the telephoto end.