Patent ID: 8867150

Claim:
An image pickup lens for forming an image of a subject on a photoelectric conversion part of a solid-state image sensor, consisting of, in order from an object side thereof: a first lens having a positive refractive power and having a convex surface directed to an object side; a second lens of a meniscus shape having a negative refractive power and having a concave surface directed to an image side; in order from an object side thereof: a third lens having a positive refractive power; a fourth lens having a positive refractive power and having a convex surface directed to the image side; and a fifth lens having a negative refractive power and having a concave surface directed to the image side, wherein an image side surface of the fifth lens has an aspheric shape, has an inflection point at a position other than an intersection with an optical axis, and satisfies the conditional expressions below, −0.8 <f 5 /f<− 0.4 (1) 0 <d 45 /f< 0.07 (2) 0.10 <f/f 3<0.50 (3) where f 5 is a focal length of the fifth lens, f is a focal length of an entire system of the image pickup lens, d 45 is an air separation on the optical axis between the fourth lens and the fifth lens, and f 3 is a focal length of the third lens.