Patent ID: 9081170
Filing Date: 2015-07-14
Classification: G02B

Abstract:
1. A zoom lens comprising: a first lens unit having positive refractive power; a second lens unit having negative refractive power; a third lens unit having positive refractive power; a fourth lens unit having negative refractive power; and a fifth lens unit having positive refractive power; wherein the first, second, third, fourth and fifth lens units are arranged in order from an object side to an image plane side along an optical axis of the zoom lens, wherein the fourth lens unit includes a positive lens and a negative lens and is configured to move in a direction having a component perpendicular to the optical axis so as to move an imaging position in a direction perpendicular to the optical axis; and wherein, during zooming, the fourth lens unit does not move, and the second, third and fifth lens units move in a direction of the optical axis; and the following conditional expressions are satisfied: where ft is a focal length of the zoom lens at a telephoto end; f