我用600 II F4.0 + 1.4X III,都感到对焦减慢。
如照静物,2X 还行;有人用过Canon第二代长焦 + Canon 第三代 2X,画质还行。
我用600 II F4.0 + 1.4X III,都感到对焦减慢。
如照静物,2X 还行;有人用过Canon第二代长焦 + Canon 第三代 2X,画质还行。
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