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ljj722:弱弱的问一下:怎么判断是10×呢? (2016-07-03 09:53) J+jmSK%z
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半颗心:放大镜或者目镜的放大比按照 250/f 来计算,f=25mm,就是10X了。 (2016-08-25 10:07) h L]8e>a?