本帖最后由 gotham 于 2009-7-7 14:23 编辑 2 C- R; S' ?+ b2 N# F" H2 y $ S' G6 \& H: Z) fIt is believed that "1/focal length" is used as the minimum "safe" shutter : K3 `& W) i$ o U# p# Aspeed for handheld shots. But I believe there are always some "iron hands" existed, lol