本帖最后由 gotham 于 2009-7-7 14:23 编辑 : y/ p# H3 [" C1 C, F, E- U1 w - S1 N. |! a8 \7 D; u( C6 XIt is believed that "1/focal length" is used as the minimum "safe" shutter ' m$ o/ O: `% p* ]6 ]4 p7 A. mspeed for handheld shots. But I believe there are always some "iron hands" existed, lol