Imaging lens

An imaging lens comprising, in order from an object side to an image side, a first lens with positive refractive power having an object-side surface being convex in a paraxial region, a second lens with negative refractive power in a paraxial region, a third lens with negative refractive power having an object-side surface being convex in a paraxial region, a fourth lens having an object-side surface being convex in a paraxial region, a fifth lens with negative refractive power in a paraxial region, and a sixth lens with positive refractive power having an image-side surface being convex in a paraxial region, wherein the following conditional expressions (1), (2) and (3) are satisfied:

• 11.00<vd2<27.00 (1)
• −1.55<f3/f<−0.20 (2)
• 0.25<r3/f<5.00 (3)
• where
• vd2:
• an abbe number at d-ray of the second lens,
• f3:
• a focal length of the third lens,
• f:
• a focal length of the overall optical system of the imaging lens, and
• r3:
• a paraxial curvature radius of an object-side surface of the second lens, and
• wherein an image-side surface of said first lens is convex in a paraxial region.