Patent ID: 7085068

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 its object side and that includes a positive plastic lens element having at least one aspheric lens surface, 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, and a fifth lens component that is a negative lens component; and the first lens group and at least part of the second lens group are movable along the optical axis for zooming, and said fifth lens component is movable along the optical axis for focusing independent of movement of the other lens components of said second lens group.