你需要根据你手的稳定性来调节快门速度。
You will have to adjust your shutter speed depending on how steady your hand is.
第二个必要的条件是，操作者可以调节感光，曝光，快门以及压缩质量，以手控的方式拍摄。
The second obligatory condition is the possibility to shoot in manual mode, when sensitivity, exposure, diaphragm, and the compression quality can be adjusted by the user.
实际上，使用数码相机提供的预设模式时，相机会从光圈和快门速度两方面进行调节，以使通光量翻倍。
In fact, using digital cameras provide default mode, phase opportunities from two aspects of the aperture and shutter speed on the adjustment, in order to make the amount of light, doubled.
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