本帖最后由 gotham 于 2009-7-7 14:23 编辑 . G0 A) n, X- Z; Z# ]) w * J; ^8 }! F8 t! L. R$ T' IIt is believed that "1/focal length" is used as the minimum "safe" shutter . A: R# a1 I- tspeed for handheld shots. But I believe there are always some "iron hands" existed, lol