因为在最大闪光灯范围外拍摄的照片显得太暗。
Because pictures taken beyond the maximum flash range will be too dark.
对于许多相机而言,最大闪光灯范围低于十五英尺,即大约五步外。
For many cameras, the maximum flash range is less than fifteen feet-about five steps away.
如果人物在五英尺内,可使用充分闪光模式,在五英尺外,则需要使用完全闪光模式。
If the person is within five feet, use the fill-flash mode; beyond five feet, the full-power mode may be required.
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