Patent ID: 7215492

Claim:
An image pickup lens for forming a subject image on an photoelectric converter of a solid-sate image pickup element, comprising: an aperture stop; a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a positive refractive power; and a fourth lens having a negative refractive power, wherein the aperture stop and the first to fourth lenses are arranged in this order from an object side of the image pickup lens, the image pickup lens satisfies 0.8 <f 1 /f< 2.0, and 0.3 <f 3 /f <1.5, where f 1 is a focal length of the first lens, f 3 is a focal length of the third lens, and f is a focal length of a total system of the image pickup lens.