DPReview.com is closing April 10th - Find out more

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

Started Jul 9, 2020 | Discussions thread
quiquae Senior Member • Posts: 2,265
Re: Yes and no

John Sheehy wrote:

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.

EOS R actually has exactly the same low-light focusing spec (EV -6 @ F1.2) as R5, and only half a stop behind R6 (EV -6.5), which suggests that it shouldn't lag much the newer bodies in low-aperture focusing, if at all. But we'll see.

 quiquae's gear list:quiquae's gear list
Canon EOS R5 Canon EF 100mm F2.8L Macro IS USM Canon EF 70-200mm F4L IS USM Canon EF 16-35mm F4L IS USM Canon EF 100-400mm F4.5-5.6L IS II +6 more
Post (hide subjects) Posted by
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow