Patent ID: 9134512
Filing Date: 2015-09-15
Classification: G02B

Abstract:
1. A zoom lens comprising, in order from the object side to the image side: a first lens unit having positive refracting power; a second lens unit having negative refracting power; a third lens unit having positive refracting power; a fourth lens unit having negative refracting power; a fifth lens unit having positive refracting power; and a sixth lens unit having negative refracting power, in zooming from a wide angle end to a telephoto end, the lens units being moved such that a distance between the first lens unit and the second lens unit is increased, a distance between the second lens unit and the third lens unit is decreased, a distance between the third lens unit and the fourth lens unit is increased, and a distance between the fourth lens unit and the fifth lens unit is decreased, in focusing from an infinitely distant object to a near object, the sixth lens unit being moved toward the image side, wherein the sixth lens unit includes one or more positive lenses, and wherein the zoom lens satisfies conditional expressions where D2Rw is a distance, at the wide angle end, between rear principal point of the second lens unit and a front principal point of a rear lens group including the third and subsequent lens units, and fRw is a focal length of the rear lens group at the wide angle end, and νd6p is the Abbe number of the material of at least one of the positive lenses.