Patent ID: 8089700
Filing Date: 2012-01-03
Classification: G02B

Abstract:
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, the second lens unit including a positive lens; and a third lens unit having a positive refractive power, the third lens unit including a positive lens, wherein intervals between adjacent ones of the first lens unit, the second lens unit, and the third lens unit are variable during zooming, wherein a refractive power of a material of the positive lens included in the second lens unit (Nd wherein the second lens unit further includes a plurality of negative lenses, and wherein the positive lens included in the second lens unit is located adjacent to and on an object side of a negative lens having the shortest focal length of the focal lengths of the plurality of negative lenses.