Patent ID: 6995925

Claim:
A zoom lens formed of only two lens groups, in order from the object side, as follows: a first lens group; and a second lens group; wherein the first lens group includes, in order from the object side, a first lens component of negative refractive power that includes a negative plastic lens element having at least one aspheric lens surface, and a second lens component of positive refractive power; the second lens group includes, in order from the object side and without any intervening lens elements, a diaphragm for controlling the light that passes through the zoom lens, a third lens component of positive refractive power that includes a convex lens surface on the object side, and that includes a positive plastic lens element having at least one aspheric surface, and a fourth lens component that includes only two lens elements that are, in order from the object side, a fourth lens element of negative refractive power and a fifth lens element that, together, form a lens component doublet; the first and second lens groups are movable along the optical axis for zooming and the first lens group is movable along the optical axis for focusing according to a change in object distance; and said first lens component consists of said negative plastic lens element and both lens surfaces of the said negative plastic lens element are aspheric lens surfaces, and said third lens component consists of said positive plastic lens element and both lens surfaces of said positive plastic lens element are aspheric lens surfaces.