Patent ID: 7466911

Claim:
An image taking lens forming an optical image on an solid-state image pickup element, the image taking lens comprising, in order from an object side thereof: an aperture stop; a first lens with a positive power; a second lens with a negative power; and a third lens with a negative power, wherein the third lens comprises an image side surface in an aspheric shape such that a region around an optical axis in the aspheric shape is formed in a concave shape facing an image side of the image taking lens and a peripheral region in the aspheric shape surrounding the region around the optical axis is formed in a convex shape facing the image side of the image taking lens, and the image taking lens fulfills a following conditional formula: −0.48 <f/f 3<−0.02, where f is a focal length of a total system of the image taking lens, and f 3 is a focal length of the third lens.