A zoom lens includes a first lens group, a second lens group, a third lens group and a fourth lens group, all of which are arranged in sequence from an object side to an image side along an optical axis. The first lens group is with positive refractive power. The second lens group is with negative refractive power. The third lens group is with positive refractive power. The fourth lens group is with positive refractive power. The first lens group includes a first lens and a second lens, both of which are arranged in sequence from the object side to the image side along the optical axis, wherein the first lens group and the first lens satisfy the following condition: −1.2