本帖最后由 gotham 于 2009-7-7 14:23 编辑 3 C b6 S" u- H2 T \: r" \ - T) |. w" ^0 p- d4 r3 O& ^It is believed that "1/focal length" is used as the minimum "safe" shutter ( T I0 n( t# Sspeed for handheld shots. But I believe there are always some "iron hands" existed, lol