Patent ID: 6204968
Filing Date: 2001-03-20
Classification: G02B

Abstract:
A zoom lens system consisting from an object side:a first lens unit of a positive refractive power;a second lens unit of a positive refractive power movable in a vertical direction relative to an optical axis for compensation of an image blur caused by vibration of the entire zoom lens system, said second lens unit consisting of three or less lens elements; anda third lens unit of a negative refractive power;wherein said first through third lens units are movable in an optical axis direction for zooming from a shortest focal length condition to a longest focal length condition so that a distance between said first and second lens units increases and a distance between said second and third lens units decreases, wherein a most image side surface of the second lens unit is convex to an image side and the following condition is fulfilled: ##EQU8##where .phi..sub.DF is a refractive power of a front lens unit of the second lens unit and C.sub.DR is a curvature of the most image side surface of the second lens unit.