Patent ID: 7511898
Filing Date: 2009-03-31
Classification: G02B

Abstract:
1. A zoom lens comprising, in sequence from an object side to an image side along an optical axis: a first lens group having a positive refracting power; a second lens group having a negative refracting power; a third lens group having a positive refracting power; a fourth lens group having a positive refracting power; a fifth lens group having a negative refracting power; and a sixth lens group having a positive refracting power, wherein the first lens group includes a reflecting member for bending the optical axis by substantially 90 degrees, wherein the first and third lens groups remain stationary on the optical axis when the zoom lens zooms or focuses, wherein zooming is performed by moving the second, fourth, and fifth lens groups along the optical axis, wherein focusing is performed by moving the fourth lens group and/or the fifth lens group along the optical axis, wherein image shift is performed by moving the sixth lens group in a direction substantially perpendicular to the optical axis, and wherein the fourth lens group includes a single positive lens and a single negative lens.