Patent ID: 8724231

Claim:
A zoom lens comprising, in order from an object side to an image side: a front lens group including a first lens unit having positive refractive power and a second lens unit having positive or negative refractive power; a reflecting mirror configured to bend an optical path; and a rear lens group including two or more lens units, wherein, during zooming, the reflecting mirror is stationary, and the first lens unit and at least two lens units included in the rear lens group move, wherein, when the zoom lens is retracted, the reflecting mirror performs at least one operation of a rotation around a rotational shaft and a movement in a direction of an optical axis of the rear lens group, and at least part of the front lens group is stored in a space formed by the operation of the reflecting mirror, and wherein the following conditions are satisfied: 0.50<|( M max− M min)|/( D−Lp/√ 2)<1.00 10.5 <ft/|fn|< 30.0 where fn is a focal length of a lens unit having the highest absolute value of refractive power among lens units having negative refractive power included in the front lens group, ft is a focal length of the entire zoom lens at a telephoto end, Mmax and Mmin are respectively a maximum value and a minimum value of amounts of movement of the at least two lens units included in the rear lens group during zooming from a wide-angle end to the telephoto end, Lp is a length of a reflecting surface of the reflecting mirror in a cross section including an optical axis of the front lens group and an optical axis of the rear lens group, and D is a maximum effective diameter of the first lens unit.