| 摘要 |
PROBLEM TO BE SOLVED: To provide a wide-angle imaging lens that has a small F number, high resolution power, and a reduced distortion aberration.SOLUTION: The wide angle imaging lens comprises in order from an object side to an image surface side: a first lens L1 of positive refractive power, the concave face of which is oriented toward the object side; an aperture diaphragm ST; a second lens L2 of negative refractive power the concave face of which is oriented toward an image side; a third lens L3 of positive refractive power; a fourth lens L4 of positive refractive power the concave face of which is oriented toward the object side; and a fifth lens L5 of negative refractive power the concave face of which is oriented toward the image side. |
