Patent ID: 9465203
Filing Date: 2016-10-11
CPC Classification: G02B

Claim Text:
1. A zoom lens, comprising, in order from an object side to an image side: a first lens unit having a positive refractive power; a second lens unit having a negative refractive power; and three or more lens units, wherein an interval between adjacent ones of the lens units is changed during zooming, wherein an N-th lens unit, where 5<N holds, counted from the object side has a negative refractive power, and is configured to move to the image side during focusing from an infinite object distance to a close object distance, the N-th lens unit comprising, in order from the object side to the image side, a negative lens, a positive lens, a negative lens, and a positive lens, and wherein the following conditional expressions are satisfied: where f N represents a focal length of the N-th lens unit, f T represents a focal length of an entire system at a telephoto end, o 1N represents a distance from a surface vertex of a lens surface on the object side of a lens closest to the object side of the N-th lens unit to a front principal point position of the N-th lens unit, and d N represents a length on an optical axis of the N-th lens unit.