“管窥效应”是理解新闻摄影真实性原则的一种新阐释。本文从摄影自身的特点、媒介特性两方面入手,分析了摄影拍摄与观看的方式,指出观察能力的不同是相机和人眼的重要差别之一,透过镜头产生的新闻照片受到“管窥效应”的深刻影响。“管窥效应”从揭示、选择与遮蔽三个层面体现在新闻摄影传播过程中,新闻照片是有超越人眼的揭示能力,但也是主观建构的结果,同时也遮蔽了很多信息。 “Glimpse of the effect ” is a new interpretation of the principle of understanding the authenticity of news photography. This paper analyzes the characteristics of photography and media characteristics, and analyzes the ways of shooting and watching photography. It points out that the difference of observation ability is one of the important differences between the camera and the human eye. The news photos produced through the camera are subject to "Profound influence. From the perspectives of revealing, selecting and sheltering, the news photograph has the ability of revealing beyond the human eyes, but also the result of the subjective construction, and at the same time it blocks a lot of information.