EOS Lenses on RF Cameras

[alan_ginman]

I have a question for people using EOS lenses on RF cameras. I have a small number of EOS lenses that I use with EOS film cameras. I am considering changing my mirrorless system to Canon RF to reduce the number of lenses that I own.  

When you use your EOS lenses on RF bodies via an adapter do you notice any disadvantages in terms of handling, focus speed or any other criteria? Or do they handle like native RF lenses?

Many thanks for your time.

Alan

[steve_dunn2]

I can't help from personal experience as, like you, I'm contemplating getting an RF-mount body to use with my existing EF lenses (for now, at least - I definitely don't have the budget to replace my perfectly good lenses at the moment).  But I recently stumbled across this page on Canon's site which lists which EF and RF lenses are compatible with various features on several recent RF-mount bodies.  Perhaps it will be useful information for you.
 

[mike_clinard1]

I’m not a pro… just an avid hobbyist and find my EF lens work as good or even faster on my R mount camera using the basic EF-RF adapter. May be due to the faster focusing capability of the newer camera.

[dmanthree]

I've switched, but my EF lenses worked better on my R5 than my DSLR. AF was better, and far more accurate. Just use a Canon adapter and you'll be surprised how good the EF glass is.

[Mohammed Majumder]

I have an R5 (my only DSLR).  I've used Canon EF 70-200mm f/4L IS USM, Canon EF 50mm f/1.2L USM, and SP 90mm F/2.8 Di MACRO 1:1 VC USD with the adapter.  I only have the RF 28–70mm F2 L USM.  I do notice that the focus hunting is an issue with the EF lenses compared to the RF.  However, I expect EOS bodies to perform equally, if not worse.  I believe it's more of a lens/drive issue than the focusing algorithm.  However, the picture quality is not compromised in any way that I could notice.

 

As @dmanthree pointed out, please do go with the Canon original adapter.

Edited August 22 by majumder

[paddler4]

I use a number of EF lenses with adapters on my R6 Mark II. They work fine. The only disadvantage is that the lens+adapter is longer than the RF equivalent in many cases. That wasn't enough reason in my mind to spend thousands to change lenses.

However:

-- make sure it's a Canon adapter.

--you mentioned film cameras. How old are the lenses? I have no idea how well really old EF lenses work. The models I own are not that old--a 100mm L macro, a 70-200 L f/4 mark II are the ones I use the most with it.