Zoom lens having wide-angle and telephoto modes and photographing apparatus including the same

摘要

A zoom lens including 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; a fourth lens group having a negative refractive power; and a fifth lens group having a positive refractive power. The first through fifth lens groups are arranged sequentially from an object side to an image side of the zoom lens, and the first lens group includes a doublet lens and a lens having a positive refractive power. The second lens group includes a first sub-lens group having a negative refractive power and a second sub-lens group having a negative refractive power that is arranged to perform a focusing function. Each of the lens groups is arranged to move when the zoom lens is zoomed.