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Will new 600 and 800mm lenses autofocus on R/RP?

Started Jul 9, 2020 | Discussions thread
John Sheehy Forum Pro • Posts: 26,688
Re: Yes and no
1

quiquae wrote:

Jon555 wrote:

They will definitely AF as-is, f/11 is fine for all DPAF, but I doubt you'll be able to add the extenders, especially the 2x, and have AF work (other than with a R5 or R6 that is).

Actually, I think you're wrong about that. Canon's official product pages for the extenders are now up, and they don't say anything about the extenders not working on R or RP.

It's not about the TC itself where there may be an issue; it is about the resulting open f-number. Canon says f/22 works on the R5 and R6, meaning that AF is reasonably fast and reliable by some standard. It is possible that the same f/22 will be more difficult for the R and RP, with more hunting in low light and low contrast.

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