Patent ID: 7113347

Claim:
A zoom lens, comprising, in order from an object side to an image side: a first lens unit of negative optical power; a second lens unit of positive optical power; and a third lens unit of positive optical power, said third lens unit consisting of one or two lenses including a positive lens element, wherein a separation between said first lens unit and said second lens unit and a separation between said second lens unit and said third lens unit are varied to effect variation of magnification, and wherein said zoom lens satisfies the following conditions: ndp3<1.5 vdp3>70.0 where ndp 3 and vdp 3 are a refractive index and Abbe number, respectively, of material of the positive lens element in said third lens unit, wherein said first lens unit includes a negative meniscus lens having a concave surface facing the image side, wherein said second lens unit includes a cemented lens consisting of two lens elements cemented together, and wherein said first lens unit consists of a negative lens and a positive lens, the negative lens of said first lens unit being an aspheric lens.