本帖最后由 gotham 于 2009-7-7 14:23 编辑 & H; U/ k( ?. V( \! X; X! j; @+ j( x; z' ?2 V
It is believed that "1/focal length" is used as the minimum "safe" shutter 8 d) r6 p `: x E. lspeed for handheld shots. But I believe there are always some "iron hands" existed, lol