Patent ID: 7626766
Filing Date: 2009-12-01
Classification: G02B

Abstract:
1. A zoom lens system comprising: a plurality of 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 comprises a second lens unit that includes a lens element having a reflecting surface for bending a light beam from an object, and the following condition (1) is satisfied: where, C is an effective radius of the image side surface of the most object side lens element in the second lens unit that causes an interval between the image side surface of the most object side lens element in the second lens unit and the lens element having a reflecting surface to be equal to a sag of the image side surface of the most object side lens element in the second lens unit S is a sag of the image side surface of the most object side lens element in the second lens unit at height H, H is one-half of an optical axial thickness of the lens element having a reflecting surface, R is a radius of curvature of the image side surface of the most object side lens element in the second lens unit, and d