为什么说焦距是从镜片中心到底片或ccd等成像平面的距离。还有透镜组的焦距怎么算? 知乎 Template




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tomski为什么说焦距是从镜片中心到底片或ccd等成像平面的距离。还有透镜组的焦距怎么算? 知乎 coloring