Patent ID: 9448418
Filing Date: 2016-09-20
CPC Classification: G02B

Claim Text:
1. A zoom lens, consisting of: a first lens group having a positive refractive power; a second lens group having a negative refractive power; and a third lens group having a positive refractive power, the first lens group, the second lens group, and the third lens group provided in first to third order from an object side, the first lens group, the second lens group, and the third lens group configured to move during an operation wherein the zoom lens changes magnification; the first lens group, the second lens group, and the third lens group each being moveable such that a distance between the first lens group and the second lens group is greater, and a distance between the second lens group and the third lens group is smaller, at a telephoto end compared to a wide angle end; the third lens group comprising a plurality of lenses, and distances among the plurality of lenses provided in the third lens group being constant while changing magnification; the third lens group consisting of a the the wherein the focusing lens group has a positive refractive power; and wherein a lens group having a negative refractive power, which is fixed during focusing operations and when camera shake occurs, is provided adjacent to the focusing lens group toward the image side thereof.