1.4 or 2.0 extender?

Started Jul 16, 2012 | Discussions thread
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Re: 1.4 or 2.0 extender?
In reply to UPLOCOFAN, Jul 18, 2012

I have both. In my case the 2x results in unacceptable IQ loss unless you use it with the 2,8L 300mm or 400mm. Frustrating on the 5.6 400mm 2.8/200mm or 2/135mm. micro adjustment didn't help on a 5DM2.

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