Patent ID: 8654241

Claim:
An image pickup lens having a five-lens-element construction for forming an image of an object on a photoelectrical converter of a solid-state image pickup element, the image pickup lens comprising, in order from an object side thereof: a first lens having a positive power and comprising a convex surface facing the object side; an aperture stop; a second lens having a negative power and comprising a concave surface facing an image side of the image pickup lens, at least one surface of the second lens being aspheric; a third lens; a fourth lens having a positive power and comprising a convex surface facing the image side; and a fifth lens having a negative power and comprising a concave surface facing the image side, wherein the first to fifth lenses are separated from each other, wherein the surface of the fifth lens facing the image side is an aspheric surface and an inflection point is arranged on an area on the surface of the fifth lens, the area excluding an intersection point of the surface of the fifth lens with an optical axis of the fifth lens, and the image pickup lens satisfies the following expression: 15<ν2<31, wherein ν2 is an Abbe number of the second lens.