Patent ID: 7458737

Claim:
A taking lens system for forming an image on a solid-state image sensor, the taking lens system comprising, from an object side thereof: an aperture stop; a first lens element having a positive optical power and convex to the object side; a second lens element having a positive optical power and convex to an image-surface side; and a third lens element having a negative optical power and concave to the image-surface side, wherein the following conditional formulae (1) and (2) are fulfilled: 1.3 <f 1 /f 2<3 (1) −4<( r 2 +r 3)/( r 2 −r 3)<−2 (2) where f 1 represents a focal length of the first lens element; f 2 represents a focal length of the second lens element; r 2 represents a radius of curvature of an object-side surface of the first lens element; and r 3 represents a radius of curvature of an image-side surface of the first lens element.