Patent ID: 9726868
Date: 2017-08-08
CPC Classifications: G02B

Claim:
1. A zoom lens comprising, in order from the object side to the 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 negative refractive power; and a fifth lens unit having a positive refractive power, wherein the zoom lens has an aperture stop arranged between the second lens unit and the fourth lens unit, during zooming from the wide angle end to the telephoto end, the distances between the lens units vary in such a way that the distance between the first lens unit and the second lens unit is larger at the telephoto end than at the wide angle end, the distance between the second lens unit and the third lens unit is smaller at the telephoto end than at the wide angle end, and the distance between the fourth lens unit and the fifth lens unit is larger at the telephoto end than at the wide angle end, and the zoom lens satisfies the following conditional expression (3): where f 2 is the focal length of the second lens unit, and IH t is the largest image height of the zoom lens at the telephoto end in the state in which the zoom lens is focused at infinity on the optical axis.