1mm,是因为微距镜的比率是1：1。

来源: JiabinL 于 2016-02-12 14:11:34 [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.