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Wide-angle attachment lens

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专利汇可以提供Wide-angle attachment lens专利检索,专利查询,专利分析的服务。并且PURPOSE:To compensate various aberrations excellently by allowing a lens system consisting of a positive and a negative lens to meet specific requirements. CONSTITUTION:This attachment lens LA is attached at the object side of a zoom lens LZ having a macro-photography mechanism and has negative focal length nearly equal to the object distance at which photography is possible with the macro-photography mechanism. This attachment lens has the positive lens LP and negative lens LN. In this case, inequalities I -IV hold, where fp and fN, np and nN, and nup and nuN are the focal lengths, refractive indexes, and Abbe numbers of the positive lens LP and negative lens LN respectively and (f) is the focal length of the whole attachment lens LA.,下面是Wide-angle attachment lens专利的具体信息内容。

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