MeikeMK-EFTR-B for Canon EF/EF-S Lens to RF Mount Cameras Auto-Focus Lens Adapter with Control Ring for Canon EF/EF-S Lenses to Canon EOS R RP R5 R6 R7 R10 C70

This is the one you are looking for. No issues. Does exactly what it says it does.

I am not familiar with the autofocus performance of the Canon RF-EF adapter with the control ring, but this adapter is perfectly fast and has performed very well every time I have used it. The lens I use the adapter with is the Canon EF 70-200mm f/4 IS USM and it works perfectly. I am also a huge fan of the control ring. I would recommend this adapter to anyone who is on a budget and uses the control ring. It adapts well to my Canon EOS R and is half the price of the Canon control ring adapter.

This isn't the best-made adapter, but it works well and comes with the addition of a ring to enable different features on the camera (aperture, focus). And I haven't had any issues with it not communicating with my Canon EOS lenses and the the Canon R camera. Plus, the price is very attractive.

When I first received it, it was doing something funny to the autofocus and aperture of my lenses on the R6. However, after updating the firmware on the adapter, everything works well.TIP: When updating firmware on Windows, the menu during software install will give you 2 language options: English and some other language that Windows could not read and gave me random characters. When selecting English, the installer gave me gibberish characters. All you have to do is press next/continue and once done installing, the software will be installed in English.As to the build quality, the control ring adapter fits snugly and has a nice finish to it.

This adapter is great. It does everything I need it to do at a fraction of the cost of the Canon version. Attaches smoothly to the body, and lenses attach smoothly to it as well. Isn't very large and doesn't add an unreasonable amount of bulk by any means.I have to get used to where to reach when I'm looking to use the ring vs. zoom but that would certainly be the case with the Canon version as well.The camera doesn't throw any warnings etc. or differentiate it in any way from the Canon version. It just works.Very glad I found this affordable alternative so I can keep using my old lenses with my new camera.

I got myself Canon R6 but still have lots of EF lenses in my arsenal. I mainly do Birding and Aviation photograpphy .. mouonted the Tamron 150x600mm G2 lens and it so far perform perfectly no issue there .. all functionalti works ... as good as the Canon RF to EF adapter but this one added the control ring. I have the control ring set to the default exposure compensation. also tried on tghe CAnon 70-200 F2.8 IS with 2x extender iii seems working oK~ .. make and fit of the adapter is very good and u can see the detail of the adapter is well made even have weather seal...overall quite happy+++++++++++++++++++++++++++++++ UPdate on the Adapter... I use it for almost a month and have the following update!< ... again this unit have the latest firmware update as of 7/2022. and if I leave my R6 turn off and with the adapter and my lens mounted !it drains the battery out after a day or two! .... I use the CAnon RF ADapter ... do the same thing but the battery did not drain! so! it is the adapter than the body! anyway! just to make aware for other users!....wonder if others have this problems??

Eliminates the need for keeping multiple ND filters and/or step up rings.

It fits very tight the first couple of times you put this on. Don’t get scared like I did when I couldn’t remove it, just be patient. The ring works perfectly although it won’t work if you have a full manual lens. I haven’t updated but so far works fine.Totally recommends if you have a good collection of EF lens and don’t want to invest in the new and expensive RF lens.