| 摘要 |
An image pickup lens having a relatively wide angle of field with various aberrations preferably corrected and having a small F-value is achieved. The image pickup lens is composed of, in order from an object side, an aperture stop, a first lens of a biconvex shape having a refractive power, a second lens of a meniscus shape having a negative refractive power with a concave surface facing the object side near the optical axis, a third lens of a meniscus shape having a positive refractive power with a concave surface facing the object side near the optical axis, and a fourth lens of a biconcave shape having a negative refractive power near the optical axis, wherein the image pickup lens satisfies a following conditional expression (1): 0.6<f1/f<0.8(1) where f1 represents a focal length of the first lens, and f represents a focal length of the overall image pickup lens.
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