Pickup lens

A pickup lens, comprising a first lens L1, having a meniscus shape with concave surface on the object side, and having negative refractive power;

• an aperture diaphragm S;
• a second lens L2, with convex surfaces on both the object side and the image side, and having positive refractive power;
• a third lens L3, with concave surfaces on both the object side and the image side, and having negative refractive power;
• and a fourth lens L4, with convex surfaces on both the object side and the image side, and having positive refractive power;
• and configured by arranging in order, from the object side, the first lens L1, the aperture diaphragm S, the second lens L2, the third lens L3, and the fourth lens L4;
• and wherein at least three lens surfaces among the surfaces of said first through fourth lenses are aspherical, and the following conditions are satisfied:
• +5.0<(r2+r1)/(r2−r1)<+7.0 (1)
• 0.15f<d1<0.3f (2)
• where r1 is the radius of curvature of the object-side surface of the first lens in the vicinity of the optical axis (axial radius of curvature);
• r2 is the radius of curvature of the image-side surface of the first lens in the vicinity of the optical axis (axial radius of curvature);
• d1 is the thickness of the first lens;
• and, f is the focal length of the entire system (the combined focal length of the lens system comprising the first, second, third, and fourth lenses).