本帖最后由 gotham 于 2009-7-7 14:23 编辑 ) D! @% E7 j$ l. E9 d# f 4 P# A' A' b Q4 J& q# v1 r @It is believed that "1/focal length" is used as the minimum "safe" shutter 5 U; @+ {) p* r$ f, Bspeed for handheld shots. But I believe there are always some "iron hands" existed, lol