Patent ID: 9453992
Filing Date: 2016-09-27
CPC Classification: G02B,H04N

Claim Text:
1. A zoom lens comprising, in order from an object side to an image side: a first lens unit having positive refractive power; a second lens unit having negative refractive power; a third lens unit having positive refractive power; and a rear lens group including one or more lens units, wherein an interval between adjacent lens units is changed in zooming, wherein the first lens unit is positioned closer to the object side at a telephoto end than at a wide-angle end, the first lens unit includes at least four lenses, the first lens unit includes one or more positive lenses using a material that satisfies a conditional expression of where an Abbe number of materials of positive lenses included in the first lens unit is νd conditional expressions of are satisfied, where a focal length of the zoom lens at the wide-angle end is fW, an amount of movement of the first lens unit on an optical axis in zooming from a wide-angle end to a telephoto end is M