Patent ID: 8625206

Claim:
An image pickup lens for a solid-state image pickup element, consisting of, in the order from an object side: a first lens, which has a convex surface facing the object side on an optical axis and has a positive refractive power; a second lens, which has a concave surface facing an image side on the optical axis and has a negative refractive power; a third lens, which has a convex surface facing the object side on the optical axis and has a meniscus shape; a fourth lens, which has a convex surface facing the image side on the optical axis, has a positive refractive power, and has a meniscus shape; and a fifth lens, which has a concave surface facing the image side on the optical axis and has a negative refractive power; wherein the object-side surface and the image-side surface of the fifth lens have an aspherical shape that contains at least one inflection point from the center of the lens to the periphery thereof; and the curvature radius of the fourth lens satisfies conditional expression (13) below: 1.4 <r 7 /r 8<3.0 (13) where r7 is the curvature radius of the object-side surface of the fourth lens, and r8 is the curvature radius of the image-side surface of the fourth lens.