Patent ID: 9235037
Filing Date: 2016-01-12
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 negative refractive power; a second lens unit having a positive refractive power; and a third lens unit having a negative refractive power, wherein at the time of zooming, distances between the lens units change, and a distance between the first lens unit and the second lens unit at a telephoto end is shorter than a distance between the first lens unit and the second lens unit at a wide angle end, and an aperture stop is disposed on an image side of an image-side surface of the first lens unit, and on an object side of an image-side surface of the second lens unit, and the zoom lens satisfies the following conditional expressions (1), (2), and (3) where, IH f f IH ω f ER