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镜头赋予了摄影视觉特性,快门赋予了摄影瞬间特性。因为没有了快门摄影的瞬间成像便无法实现,摄影就不能称为瞬间的艺术。快门是位于相机机身或者镜头中,控制曝光时间长短的装置。如果把光比作自来水,光圈比作输水管的口径,那么快门就是阀门,可以通过控制快门打开时间的长短来控制光量。摄影过程中,快门是与光圈配合起来使用的,可以实现丰富的曝光控制。光圈的大小变化可以形成丰富的影像效果,快门开合时间的长短不一也能带来不同的画面变化。
The lens gives photographic visual properties, the shutter gives photography instant features. Because there is no instantaneous imaging of shutter photography will not be able to achieve, photography can not be called instant art. Shutter is located in the camera body or lens, the control of exposure time length of the device. If the light is likened to tap water and the aperture is the diameter of the water pipe, then the shutter is the valve and the amount of light can be controlled by controlling the length of the shutter opening time. During photography, the shutter is used in conjunction with the aperture, enabling rich exposure control. Aperture size changes can form a rich image effects, the length of the shutter opening and closing time can also bring different picture changes.