Patent ID: 8054549
Filing Date: 2011-11-08
Classification: G02B,H04N

Abstract:
1. A zoom lens comprising, in order from an object side to an image side: a first lens unit having a positive refractive power and whose position is fixed; a second lens unit having a negative refractive power and being movable mainly for zooming; a third lens unit having a positive refractive power and whose position is fixed; a fourth lens unit having a positive refractive power and being movable for correction of a focal position and for focusing performed in response to zooming; and a fifth lens unit having a positive refractive power, wherein the fifth lens unit includes, in order from the object side to the image side, wherein an image formed on an image surface is movable in a direction'substantially perpendicular to the optical axis by moving the movable sub-unit of the fifth lens unit in the direction substantially perpendicular to the optical axis, wherein an aperture stop is provided on the object side of the third lens unit, and wherein the third lens unit includes wherein the third lens unit satisfies the following conditional expressions: where f