2013年江苏高考物理题中,有一道光学试题,涉及到单反相机的取景器问题,取景器构造如何?取景器中光路如何?为什么取到的景物与被拍物体一样?本文从物理教学角度给出简要解释.题目.图1为单反相机取景器的示意图,ABCDE为五棱镜的一个截面,AB⊥BC.光线垂直AB射入,分别在 Physical exam in Jiangsu Province in 2013, there is an optical test questions related to the viewfinder SLR camera, viewfinder structure how the viewfinder in the light path? Why take the scene and the object being photographed? This article from the perspective of physics teaching A brief explanation of the problem. Figure 1 is a schematic view of the SLR camera viewfinder, ABCDE a pentaprism cross-section, AB ⊥ BC. Light AB vertical injection, respectively