Patent ID: 9465204
Filing Date: 2016-10-11
CPC Classification: G02B,G03B

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 the image side of an image-side surface of the first lens unit, and on the object side of an image-side surface of the second lens unit, and the second lens unit includes in order from the object side to the image side, an object-side sub lens unit having a positive refractive power and an image-side sub lens unit, and the object-side sub lens unit in the second lens unit includes one lens component, and in the lens component, only an object-side surface and an image-side surface are in contact with air in an optical path, and the following conditional expressions (1) and (2) are satisfied where, D D both D ER f f