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测光、控制光通量是摄影过程中的关键,光线强弱要测定准确,光通量多少要控制得当,曝光的明暗区域要与拍摄目的一致。这些都是决定成像质量、负片的密度、照片上的影调层次的重要的曝光控制手段。曝光控制,就是根据拍摄目的选定明暗光区,作为曝光的依据,然后再通过光圈、快门速度正确的组合,控制光通量,达到拍摄的艺术追求。一般摄影,曝光控制主要的方法有:(1)以被摄物暗部的光线亮度为曝光根据,使暗部
Metering and controlling luminous flux are the key to the photography process. The intensity of light should be measured accurately, and the amount of light flux should be properly controlled. The light and dark areas of the exposure should be consistent with the purpose of shooting. These are important exposure control methods that determine the quality of the image, the density of the negative film, and the level of tone on the photo. Exposure control is based on the purpose of shooting selected light and dark areas, as the basis for exposure, and then through the aperture, the correct combination of shutter speed, control luminous flux, to achieve the artistic pursuit of photography. In general photography, the main methods of exposure control are: (1) The brightness of the light in the dark part of the subject is based on the exposure, so that the dark part