本帖最后由 gotham 于 2009-7-7 14:23 编辑 6 p4 T3 F# w! E: Y- C* d
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It is believed that "1/focal length" is used as the minimum "safe" shutter o3 L! }6 j; J. M. Mspeed for handheld shots. But I believe there are always some "iron hands" existed, lol