| 摘要 |
A close-up attachment lens, for enabling close-up photograph along with a main lens, is arranged to be attached to the object side of said main lens. The close-up attachment lens comprises, in that order from the object side, a positive first lens element, a negative second lens element, and a positive third lens element formed as a meniscus lens that is convex on the image side. Furthermore, the close-up attachment lens satisfies the following conditions: 0.005<d2/fA<0.040(1) 0.010<(d2+d4)/fA<0.060(2) wherein: di designates the distance between the ith surface and (i+1)th surface; fA designates the focal length of the attachment lens.
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