Imaging lens

An imaging lens consisting of six lenses of a negative first lens, a negative second lens, a positive third lens, a positive fourth lens, a negative fifth lens and a positive sixth lens in this order from an object side,

• wherein Abbe numbers of materials of the first lens, the second lens, the fourth lens and the sixth lens for d-line are greater than or equal to 40,
• wherein when the Abbe number of the material of the first lens for d-line is νd1, and the Abbe number of the material of the third lens for d-line is νd3, νd1/νd3 is greater than or equal to 1.4 and less than or equal to 2.5, and
• wherein the following conditional formulas are satisfied:
• −0.11<(R8+R9)/(R8−R9) (1-1);
• (R10+R11)/(R10−R11)<−0.35 (4-1);
• 1.9<(D4+D5)/f<4.4 (19-3);
• −0.2<f/R5<0.2 (20-3);
• −2.0<f/R3<1.5 (21-2);
• and
• 2<f45/f<25 (23), where
• R8:
• a curvature radius of an object-side surface of fourth lens,
• R9:
• a curvature radius of an image-side surface of fourth lens,
• R10:
• a curvature radius of an object-side surface of fifth lens, R11:
• a curvature radius of an image-side surface of fifth lens,
• D4:
• an air space between the second lens and the third lens on an optical axis,
• D5:
• a center thickness of the third lens,
• f:
• a focal length of an entire system,
• R5:
• a curvature radius of an object-side surface of the third lens,
• R3:
• a curvature radius of an object-side surface of the second lens, and
• f45:
• a combined focal length of the fourth lens and the fifth lens.