本帖最后由 gotham 于 2009-7-7 14:23 编辑 : @. u0 E u0 M( x! F3 b% m : u" @% p* _+ j, ]# A: I! P @It is believed that "1/focal length" is used as the minimum "safe" shutter K; X6 `/ J, j! J+ g% Vspeed for handheld shots. But I believe there are always some "iron hands" existed, lol