(b) time taken by a camera shutter to open and close 快门速度 *different shutter speeds 不同的快门速度 * a photograph taken at a speed of -1-250 of a second 用-1-250秒的快门速度拍摄的照片. .
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Photograph it at different shutter speeds, from slow to fast (adjust your aperture to maintain correct exposure), and see what affect it has on the appearance of the subject in the photo.
尝试用不同快门速度拍摄，由低到高(调整光圈以获得正确曝光)，注意观察它为你的拍摄带来了何种影响。
Just like with f-stops, there is a mathematical relationship between different shutter speeds-each shutter speed stays open half as long as the one above it, or twice as long the one below it.
就和f值一样，这一组数字也是一个数列关系，每一档快门速度都是比上一档快一倍的时间，或者是慢一半的时间。
In stills photography the term HDR is used to describe a technique for displaying greater dynamic range in a single image by combining several exposures photographed at different shutter speeds.
在平面摄影中，HDR代表通过不同快门速度多次曝光在单一画面中呈现更高动态范围的拍摄和修片技法。
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