Patent ID: 8736969

Claim:
A zoom lens comprising, in order from an object side to an image side: a first lens unit having positive refractive power, which does not move for zooming, the first lens unit including a lens unit which moves for focusing; a second lens unit having negative refractive power, which moves for zooming; a third lens unit having negative refractive power, which moves for zooming; a fourth lens unit having positive refractive power, which moves for zooming; and a fifth lens unit having positive refractive power, which does not move for zooming, wherein an interval between the fourth lens unit and the fifth lens unit becomes largest at a telephoto end in zooming, and the following expressions are satisfied: 0.19<|β2 w|< 0.42; and 10.0<|β2 t/β 2 w|, where β2w and β2t represent lateral magnifications of the second lens unit at a wide-angle end and at the telephoto end, respectively.