Patent ID: 7248418

Claim:
A zoom lens system comprising: a first lens unit including a reflective member that deflects an optical path; a lens unit having a positive optical power placed on an image side of the first lens unit; and a lens unit having a negative optical power placed on the image side of the lens unit having a positive optical power, the lens unit having a negative optical power is positioned closest to the image side in the zoom lens system, wherein a distance between the first lens unit and the lens unit having a positive optical power and a distance between the lens unit having a positive optical power and the lens unit having a negative optical power vary during zooming from the wide-angle end to the telephoto end, and wherein when Fe is the focal length of the lens unit having a negative optical power and Fw is the focal length of the overall system at the wide-angle end, the following expression is satisfied: 0.8<| Fe/Fw|< 2.5.