贪图便宜，花一半大洋（与F2.8比)。优点是轻便。

来源: 鱼目于 2015-01-06 14:03:15 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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贪图便宜， 花一半大洋（与F2.8比)。 优点是轻便。