| 摘要 |
PROBLEM TO BE SOLVED: To provide a photographic lens constituted of three lenses, whose sensitivities to eccentricity are reduced, by restraining the power of the respective lenses to be small and whose aberrations are satisfactorily corrected. SOLUTION: In the photographic lens, constituted by arranging an aperture diaphragm 1, a 1st lens L1, a 2nd lens L2, and a 3rd lens L3, in this order starting from the object side, the 1st lens L1 is a plane-convex lens or a positive meniscus lens turning its convex surface to the object side, the 2nd lens L2 is a negative meniscus lens, having at least one refractive surface made aspherical and turning its convex surface to the image side, and the 3rd lens L3 is a positive meniscus lens, having at least one refractive surface made aspherical and turning its convex surface to the object side. COPYRIGHT: (C)2006,JPO&NCIPI
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