本帖最后由 gotham 于 2009-7-7 14:23 编辑 0 w) j: X8 h$ Q( l, H# j " ~7 P( o( a0 jIt is believed that "1/focal length" is used as the minimum "safe" shutter ; j3 K( r) N9 V2 {2 sspeed for handheld shots. But I believe there are always some "iron hands" existed, lol