ZOOM LENS AND IMAGE PICKUP DEVICE INCLUDING THE SAME

A zoom lens and an image pickup device. The zoom lens includes sequentially from an object side a first lens group having a positive refractive power, a second lens group having a negative refractive power, a third lens group having a positive refractive power, and a fourth lens group having a positive refractive power, which are arranged in order from an object side to an image side, wherein, when the zoom lens is zoomed from a wide angle position to a telephoto position, all of the first lens group, the second lens group, the third lens group, and the fourth lens group move relative to one another so that a distance between the first lens group and the second lens group increases, a distance between the second lens group and the third lens group reduces, and a distance between the third lens group and the fourth lens group increases.