本帖最后由 gotham 于 2009-7-7 14:23 编辑 ( @% ~* S, i& k0 w- ?1 D7 a; B* F: N " ?9 ~; B5 H) b$ j0 ]& QIt is believed that "1/focal length" is used as the minimum "safe" shutter . [$ O7 |; _& e+ U/ V& u. u# rspeed for handheld shots. But I believe there are always some "iron hands" existed, lol