Patent ID: 9354431
Filing Date: 2016-05-31
CPC Classification: G02B

Claim Text:
1. A zoom lens, along an optical axis from an object side to an image side, comprising: a negative first lens group including a negative first lens, a negative second lens, and a positive third lens which are sequentially arranged from the object side toward the image side; an aperture; a positive second lens group including a positive fourth lens, a negative fifth lens, a negative sixth lens, and a positive seventh lens which are sequentially arranged from the object side toward the image side, wherein the fifth lens is formed by adhering a positive lens and a negative lens, and the positive lens is closer to the object side than the negative lens; the sixth lens is a meniscus lens with a convex surface facing the object side and a concave surface facing the image side; the zoom lens is switched to a telephoto mode from a wide mode by moving the second lens group, which is located between the aperture and the image side, from the image side toward the object side; when the zoom lens is focusing, the first lens group is moved along the optical axis relative to the aperture; and the third lens is a meniscus lens, and the negative fifth lens has a concave surface facing the image side.