是呀所以人家用600mm f/4而不是诸如150－500mm f/6.3之类。

来源: 用户名被占用了于 2013-01-04 11:12:32 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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是呀 所以人家用600mm f/4而不是诸如150－500mm f/6.3之类。