佳能相机在预览照片的时候提供小窗显示直方图和曝光数据。
In Canon cameras, the histogram is shown in the main photo review screen, together with a small preview of the photo and the exposure data.
此外，提出了两种曝光数据检验的方法，并对曝光实验中应注意的问题作了说明。
In addition, two methods of verifying exposure data are rendered, and the problems which we should pay attention to during exposure experiment are also presented.
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