| 摘要 |
An image pickup lens includes a first lens having a positive refractive power with a convex surface facing the object side, a second lens having a negative refractive power with a concave surface facing an image side, a third lens having a negative refractive power with both surfaces formed from aspheric surface, a fourth lens of a meniscus shape having a positive refractive power with a convex surface facing the image side, and a fifth lens of a meniscus shape having a negative refractive power with a concave surface facing the image side, wherein the curvature radius of the fourth lens satisfies conditional expression (13) below: 1.4<r7/r8<3.0(13) where r7 is the curvature radius of the object-side surface of the fourth lens, and r8 is the curvature radius of the image-side surface of the fourth lens.
|
