本帖最后由 gotham 于 2009-7-7 14:23 编辑 1 z7 }$ g: b7 W0 f' `$ A
_4 _2 r# k2 X+ t7 P* k& M6 C2 ZIt is believed that "1/focal length" is used as the minimum "safe" shutter & ^' B) `9 v* N; S4 z3 mspeed for handheld shots. But I believe there are always some "iron hands" existed, lol