Patent ID: 8976459
Filing Date: 2015-03-10
Classification: G02B,H04N

Abstract:
1. A zoom lens comprising in order from an object side: a first lens unit having a positive refractive power; a second lens unit having a negative refractive power; a third lens unit having a positive refractive power; and a rear lens group, including one or more additional lens unit(s); wherein at the time of zooming from a wide angle end to a telephoto end, the first lens unit moves, and the zoom lens satisfies the following conditional expressions (1), (3)′ and (8) where, FNO(W) denotes an F-number of the zoom lens at the wide angle end, ft denotes a focal length of the overall zoom lens system at the telephoto end, fw denotes a focal length of the overall zoom lens system at the wide angle end, and f1 denotes a focal length of the first lens unit.