本帖最后由 gotham 于 2009-7-7 14:23 编辑 . T/ y v4 \& s9 V 0 P% \* g/ y8 A: v- |) ^8 O5 B- OIt is believed that "1/focal length" is used as the minimum "safe" shutter * u3 n0 x$ X# f# J/ x- l. kspeed for handheld shots. But I believe there are always some "iron hands" existed, lol