这是一种Pan 的技术 4 D9 x! m' Z' c8 C; Z / {, n* x! i0 y- ]. \The basic idea behind panning as a technique is that you pan your camera along in time with the moving subject and end up getting a relatively sharp subject but a blurred background.7 w' ? v! _7 B8 a0 K! g( F
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Information coming from : http://digital-photography-schoo ... aph-moving-subjects0 T% M: L9 O/ J: l