Patent ID: 7468841

Claim:
A zoom lens comprising: a first lens group having a negative refractive power; a second lens group having a positive refractive power; and a third lens group having a positive refractive power, wherein the lens groups are sequentially aligned from an object side, the first lens group is moved along an optical axis of the zoom lens and the second lens group is moved along the optical axis toward the object side, during zooming from a wide-angle end state to a telescopic end state, the third lens group includes a negative sub-lens group having a negative refractive power, and a positive sub-lens group having a positive refractive power, the sub-lens groups being sequentially aligned from the object side, an image being able to be shifted by moving the positive sub-lens group in a direction orthogonal to the optical axis, and the following conditional expression (1) is satisfied, 0.3<1−β<2.5, (1) where β is a magnification of the positive sub-lens group of the third lens group at the telescopic end state.