Patent Number: 6,166,864

Title: Zoom lens and optical apparatus using the same

Abstract: A zoom lens includes, in order from an object side to an image side, a first lens unit of positive refractive power, a second lens unit of negative refractive power, a third lens unit of positive refractive power and a fourth lens unit of positive refractive power, zooming from a wide-angle end to a telephoto end being effected by moving the second lens unit toward the image side, and shifting of an image plane due to zooming being compensated for by moving the fourth lens unit, wherein the second lens unit consists of four separate single lenses including three negative lenses and one positive lens, and the third lens unit has at least one positive lens both surfaces of which are aspherical.

Inventors: Horiuchi; Akihisa (Yokohama, JP)

Assignee: Canon Kabushiki Kaisha

International Classification: G02B 15/163 (20060101); G02B 15/173 (20060101); G02B 015/14 ()

Expiration Date: 12/26/2017