Patent ID: 9274325
Filing Date: 2016-03-01
CPC Classification: G02B

Claim Text:
1. A zoom lens comprising: 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 unit having two or more lens units, in the order from an object side to an image side, an interval between the adjacent lens units being changed in order to carry out at least one of zooming and focusing, wherein the rear unit includes a focus lens unit that has a negative refractive power and that moves during the focusing, wherein, when the zoom lens focuses on a specific object distance, the focus lens unit moves integrally with the other lens units during zooming, and wherein the zoom lens satisfies a conditional expression of when a focal length of the second lens unit is defined as f 2 , and a combined focal length of the rear unit on the wide angle end is defined as fn.