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EF Teleconverters on R mount cameras-restrictions?

olyduck
Contributor

Hi-I anticipate buying an R mount Canon in the near future and I'm trying to decide whether I also want to trade in my

EF 100-400 L (first generation).  My question is this:

 

If I use a Canon 1.4 or 2.0 EF teleconverter with the EF 100-400, on an R mount camera (with adapter of course), what restrictions to auto focus or other functions might I encounter?  Would those same restrictions also apply to an RF 100-500 with an RF teleconverter?

 

I mainly ask because, despite the great reviews for the RF 100-500, it also costs a big chunk of change. If I could retain reasonable functionality with my EF 100-400 with EF teleconverter, that would help.  On the other hand, if that combo would prohibit some of the cool functionality that an R6 (for instance) offers (like eye focus, etc.), I might spring for the RF 100-500.

 

Thanks for any feedback. 

10 REPLIES 10

Thanks!

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