Patent ID: 7426084

Claim:
A zoom lens system comprising: at least three lens units each composed of at least one lens element, wherein an interval between at least any two lens units among the lens units is changed so that an optical image of an object is formed with a continuously variable magnification, the zoom lens system, in order from the object side to the image side, comprises: a first lens unit having positive optical power; a second lens unit that includes a lens element having a reflecting surface for bending a light beam from an object and that has negative optical power; and subsequent lens units including at least one lens unit having positive optical power, and the following condition (1) is satisfied: 1.50< M 1 /f W <3.00 (1) (where, Z=f T /f W >3.90) in which, M 1 is an amount of optical axial movement of the first lens unit at the time of zooming from a wide-angle limit to a telephoto limit, f W is a focal length of the entire zoom lens system at a wide-angle limit, and f T is a focal length of the entire zoom lens system at a telephoto limit.