Patent ID: 9253382
Filing Date: 2016-02-02
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; a third lens unit having a positive refractive power; a fourth lens unit having a positive refractive power; and a fifth lens unit having a negative refractive power, wherein: during zooming, the second lens unit is not moved and the first, third and fifth lens units are moved; a distance between the first and second lens units at a telephoto end is larger than that at a wide-angle end; a distance between the second and third lens units at the telephoto end is smaller than that at the wide-angle end; the fifth lens unit includes, in order from the object side to the image side, a positive lens sub-unit and a negative lens sub-unit which have a largest distance therebetween in the fifth lens unit; during focusing from an infinite object to a close distance object, the fifth lens unit is moved to the image side; and the following condition is satisfied: where f3 represents a focal length of the third lens unit, and f4 represents a focal length of the fourth lens unit.