191问答库 > 佳能EF2XII2倍增距是起什么作用的

佳能EF2XII2倍增距是起什么作用的

2025-03-16 00:32:28
推荐回答（1个）
回答1：

佳能的增距镜是在镜头和机身之间增加一个透镜组，将镜头的焦距变成了二倍，比如原来的200mm焦距，加上二倍镜就相当于400mm，但是付出的代价除了增距镜的钱，还有就是光圈随之变小，画质也会下降，部分镜头还会影响自动对焦。
EF增距镜有1.4和2倍两种，现在都发展到第三代了。

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