Zoom lens

A zoom lens comprises sequentially from an object side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, an aperture stop, a third lens group having a positive refractive power, a fourth lens group having a positive refractive power, and fifth lens group, wherein

• the second lens group is moved along an optical axis, from the object side toward an image side, to zoom from a wide angle edge to a telephoto edge,
• the fourth lens group is moved along the optical axis to correct image plane variation accompanying zooming,
• the third lens group includes sequentially from the object side, a positive lens having at least one aspheric surface, a cemented lens formed by a positive lens and a negative lens, and a positive lens group,
• the fourth lens group includes sequentially from the object side, a positive lens group, and a cemented lens formed by a positive lens and a negative lens, and
• the fifth lens group includes sequentially from the object side, at least one negative lens and at least one positive lens.