Patent ID: 9557543
Date: 2017-01-31
CPC Classifications: G02B

Claim:
1. A zoom lens including a plurality of lens units, in which an interval between adjacent lens units changes during zooming, comprising: a first lens subunit having a positive refractive power; a second lens subunit having a positive refractive power, which is arranged adjacent to an image side of the first lens subunit; and at least one lens unit on an object side of the first lens subunit, wherein lens systems arranged on the object side of the first lens subunit Lp wherein the second lens subunit moves along an optical axis to the image side during focusing from an object at infinity to a proximate object, and wherein the zoom lens satisfies the following conditional expression: where fp 1 represents a focal length of the first lens subunit, and fp 2 represents a focal length of the second lens subunit.