Patent ID: 7443607
Filing Date: 2008-10-28
Classification: G02B

Abstract:
1. A zoom lens comprising: in sequence from an object, a first lens group having positive refractive power, a second lens group having negative refractive power, a third lens group having positive refractive power, and a fourth lens group having positive refractive power, wherein the first lens group includes, in sequence from the object, a lens group having positive refractive power and a bending optical system for bending an optical axis to essentially an angle of 90°; the third lens group has a stationary lens group having positive refractive power and a movable lens group having positive refractive power; the second lens group and the fourth lens group are moved along the optical axis during zooming operation; and the movable lens group of the third lens group is moved in a direction orthogonal to the optical axis during vibration-control operation.