本帖最后由 gotham 于 2009-7-7 14:23 编辑 ; y$ C; P: U. t
8 R; G. K( F% P R
It is believed that "1/focal length" is used as the minimum "safe" shutter - @8 Z- Z. i5 Y: O7 {speed for handheld shots. But I believe there are always some "iron hands" existed, lol