Patent ID: 7623297
Filing Date: 2009-11-24
Classification: G02B

Abstract:
1. A zoom lens comprising, in order from an object side: a first lens group that is fixed upon zooming and wholly has a negative refractive power; a second lens group that comprises an optical path bending prism, the second lens group which is fixed upon zooming; a third lens group that is allowed to move upon zooming and wholly has a positive refractive power; a fourth lens group that is allowed to move upon zooming and wholly has a negative refractive power; and a fifth lens group that is fixed upon zooming and wholly has a positive refractive power, wherein the following Conditional Expressions (1) to (2) are satisfied: where f f f DA denotes optical path length from an image-side surface of the first lens group to an object-side surface of the third lens group, at a telephoto end.