Zoom lens and optical apparatus having the same

A zoom lens, comprising, in order from an object side to an image side:

• a first lens unit of negative optical power, said first lens unit consisting of, in order from the object side to the image side, a negative lens and a positive lens;
• a second lens unit of positive optical power;
• and
• a third lens unit of positive optical power, focusing being effected by moving said third lens unit,
• 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, during the variation of magnification from a wide-angle end to a telephoto end with an infinitely distant object focused on, said third lens unit moves monotonically toward the image side or moves with a locus convex toward the image side, and said zoom lens satisfies the following conditions:
• 0.08<M3/fw<0.4
• 0.7<|f1/ft|<1.0
• 1.45<f3/ft<2.0
• 0.63<f2/ft<0.8
• where M3 is an amount of movement of said third lens unit toward the image side during the variation of magnification from the wide-angle end to the telephoto end with an infinitely distant object focused on, fw and ft are focal lengths of said zoom lens at the wide-angle end and the telephoto end, respectively, and f1, f2 and f3 are focal lengths of said first lens unit, said second lens unit and said third lens unit, respectively.