Patent ID: 9715090
Date: 2017-07-25
CPC Classifications: G02B,G03B,H04N

Claim:
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 positive refractive power or a negative refractive power, wherein the first lens unit and the fifth lens unit do not move for zooming, and the second lens unit and the fourth lens unit move during zooming, wherein the second lens unit includes at least three negative lenses and at least two positive lenses, including: wherein the following conditional expressions are satisfied: where fw represents a focal length of the zoom lens at a wide angle end, f2 represents a focal length of the second lens unit, fp1 represents a focal length of the first positive meniscus lens, and fp2 represents a focal length of a second positive lens, wherein the second positive lens is a positive lens arranged on a second most object side among the at least two positive lenses in the second lens unit, and wherein the fourth lens unit moves during focusing.