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什么是光比“光比”是被摄体亮面和阴影面所接受的投射光强度的比值。我们在拍摄人像的时候,除去用两盏灯从照相机左右两侧照明被摄者取得影调均匀的照明效果之外,常常是被摄者亮面受光多一些,阴影面受光少一点,得到有某种立体感的照明效果。在这种情况下,如果亮面反射出的亮度是阴影面的2倍,被摄体的光比为2:1。这里所说的光比,本应为主光与辅助光照度的比值。但是,在人像摄影中,由于人脸亮面与阴影面反光率基本相
What is light ratio? Light ratio is the ratio of projected light intensity that is accepted by the subject’s bright and shadow surfaces. When we are taking portraits, we remove the effect of using two lights to illuminate the subjects from the left and right sides of the camera to obtain a uniform lighting effect. Often, the subjects have a much brighter surface and the shadow surface receives less light. Some kind of three-dimensional lighting effects. In this case, if the bright surface reflects twice the brightness of the shaded area, the light ratio of the subject is 2: 1. The light ratio here, should be the ratio of the main light and auxiliary light intensity. However, in portraits, due to the bright face of the face and the shadow of the reflective phase of the basic phase