Patent ID: 7206139

Claim:
A zoom lens system, in order from the object side to the image side, comprising: a first lens unit having positive optical power; a second lens unit that includes a reflective optical element having a reflecting surface for bending a light ray from an object and that has negative optical power; and a subsequent lens unit including at least one lens unit having positive optical power, wherein the following condition (1) is satisfied: −5.70 <f 1 /f 2 <−2.00 (1) (here, Z=f T /f W >5.0) wherein, f 1 is the composite focal length of the first lens unit, f 2 is the composite focal length of the second lens unit, f W is the focal length of the entire zoom lens system at a wide-angle limit, f T is the focal length of the entire zoom lens system at a telephoto limit, and Z is the magnification variation ratio.