Patent ID: 7982965
Filing Date: 2011-07-19
Classification: G02B

Abstract:
1. A zoom lens comprising, in order from an object side: a first lens group having negative refractive power; and a second lens group having positive refractive power; a distance between the first lens group and the second lens group being variable upon zooming from a wide-angle end state to a telephoto end state, the second lens group including a front lens group and a rear lens group, the front lens group being movable along an optical axis upon focusing on a close object, and the following conditional expression being satisfied: where D 2 F denotes a distance along the optical axis between the most object side lens surface and the most image side lens surface of the front lens group, and D 2 R denotes a distance along the optical axis between the most object side lens surface and the most image side lens surface of the rear lens group.