本帖最后由 gotham 于 2009-7-7 14:23 编辑 5 l6 ?! |* i9 N6 [$ p 5 @( l. @) K% I) `It is believed that "1/focal length" is used as the minimum "safe" shutter ) l; n' @. W' g, vspeed for handheld shots. But I believe there are always some "iron hands" existed, lol