本帖最后由 gotham 于 2009-7-7 14:23 编辑 ; B, r$ R* _. u" S3 `& D/ n* Q( c6 z4 y& u% p
It is believed that "1/focal length" is used as the minimum "safe" shutter . v- J+ x3 _8 ^speed for handheld shots. But I believe there are always some "iron hands" existed, lol