

Picture does not represent the actual item
See Options
1 Year
$18.99
2 Year
$31.99
3 Year
$43.99
Need help? Ask our experts.
Review Summary
2025-05-29T20:00:00
Decent price for just the adapter, love the versatility it adds to EOS R camera line, being able to use the high-quality EF lens I have on this camera is absolutely amazing!
N A.
2025-03-20T06:05:29
Does exactly as promised, allows you to use EF glass on RF mount cameras. Tried it with Canon, Tamron and Sigma lenses on my R5 Mark II and all lenses worked exactly as they did on my old 90D, even autofocus. Very inexpensive compared to other mount adapters. A must-have for RF mount owners - it opens up a world of EF lenses to use.
GUY I.
2025-03-19T13:19:42
Works like a charm! Great to use my EF lenses and saving on all new glass!
CHARLES L.
2025-03-09T06:04:22
It works perfectly and is a real asset so I can continue to use my EF lenses.
RICK G.
2025-01-19T03:52:50
Brand new and no issues. Super fast shipping!
Wes C.
2025-01-07T07:07:05
using te adapter wit EF lenses. Works great with no loss of IQ
TOM T.
2024-12-18T09:03:55
Extremely fast shipping. Arrived well-packed, and completely as advertised. Highly recommend Adorama.
SCOTT Y.
2024-12-17T19:00:00
Works perfectly, I just wish it wasnt so long but I understand they had a reason.
Thomas W.
2024-11-24T19:00:00
Well made. Great interface between the EOS lenses and R Bodies. I have one on my R and my R5.
Grayden A.
2024-10-04T08:59:19
Works perfectly
luiz l.
2024-09-25T11:57:43
Worked as expected.
DORINDA P.
2024-09-11T20:00:00
Refurbished product but works great. Item is in great shape
Nash
2024-08-18T20:00:00
Movement with heavy lens is concerning. Lots of plastic and the wiggle in connection concerns me, especially since I shoot action. But if this is what it takes to use my old EF lens then will make do. Not happy that their is no third party options for RF... Not all of us can afford $2000/$3000 glass.
Boogey
2024-06-13T16:29:46
Works fine.
MICHAEL T.
2024-06-07T20:00:00
A mount adapter that permits long-tern Canon camera users to use those EF lens's, some that are excellent and quite expensive, with your new R5 camera body. A simple job to do, and it seems to work OK with my EF lens, but my nice Tamron ultra-wide angle lens is not usable due to strong vignetting.
photon
2024-03-25T15:10:07
Since I was upgrading to the R series from my old Rebel, I wanted to be able to use some of my older lenses. This adapter adds a bit of extra length to the whole thing, but it works great! I mostly have one telephoto zoom that I will be using it for, but it was far less expensive than buying the same lens in the R mount. Maybe someday. I also have a Celestron spotting scope that I wanted to be able to shoot through, since I have an adapter for Canon that only supports the EF lenses. By adding this adapter to it, I can mount the R8 onto the scope just fine.
Laura K.
2024-03-19T08:33:24
This is a lifesaver for me since I've upgraded to Mirrorless. I have lots of expensive lenses for my DSLR and I was worried that upgrading to mirrorless would force me to have to buy all new lenses. This works great. Communication between EF lenses and EOS R lenses is quick. No loss of Autofocus or lens controls.
Rebecca R.
2024-03-14T14:20:17
Works just fine.
Joseph M.
2024-01-22T13:33:23
It works as advertised.
Gregory S.
2024-01-22T07:37:51
It works seamlessly with my EF lenses. There is no conceivable lag in the AF responsiveness.
WARD F.
2024-01-10T11:06:50
Does exactly what I need it to. Very high quality and its never left my camera. I would eventually toss it or hardly use it if I ever invest in RF glass, but it never leaves my body and serves its purpose.
Drake B.
2024-01-03T19:00:00
I was gifted an R7 to replace my 77D. I don't have the funds currently to buy new lenses so I bought the adapter so that I could use what I have. I haven't used it much, shot some wildlife photos while on vacation. It worked fine for that.
CM757
2024-01-02T19:00:00
Easy to use. Works as it should. Allows me to use my EF glass on my R50
Dee D.
2023-12-21T09:20:36
Works fine allowing me to use all of my EF lenses on my R5.
Gary P.
2023-12-15T05:22:01
It does what it is supposed to do and seems to be sturdy and dependable.
MATT A.
2023-12-14T05:46:35
Everything works as it should. Seamless.
JOSH P.
2023-11-13T06:10:05
Made mistake of buying non-Canon connector and had issues with AF. Adorama has been my store since the early 2000's. Always go back for professional advice and great deals.
GRETCHEN F.
2023-11-01T20:00:00
Once you align the correct dots, it fits snug and secure.
Dwayne P.
2023-10-01T20:09:34
I have three EF lenses left in my bag and an EF-EOS R adapter on each one. I do not have to swap or remember to bring one.
PETER P.
2023-09-28T10:12:18
the adaptor works seemlessly with the canon L series and sigma sport lenses I've tried it with. it doesn't seem to have any impact on their speed.
ASHLEY J.
Extend coverage on pre-owned products after the retailer warranty ends and protect photo & video gear from accidental damage with Adorama Protect.
If we can’t fix it, we’ll replace it at no additional cost.
Coverage for pre-owned gear begins after the retailer warranty ends, plus accidental damage protection for photo/video gear that starts on day one.
Enjoy your gear without fear. We have you covered!
When regular use of your product over time results in mechanical or electrical failure.
We will never charge you a deductible after the purchase of a plan.
Our claims process is simple & easy and our customer service team is happy to help.
Adorama Protect powered by Extend is available for purchase to customers in the United States. Not available for International and U.S. territories purchases. Plans on pre-owned items do not cover pre-existing damages.
Browse our FAQ
My EF lenses are better than ever!
By BDP
This works great with my EF lenses, and except for the added length they feel like native RF glass. The only lens I felt compelled to replace was the V1 of the 70-200 IS 2.8 L - because the RF version is lighter and shorter and sharper (and the adapter makes the EF even more front heavy). Since I am currently using a 5d IV for a backup this will allow me to use the rest of my lenses until I jump into mirrorless with both feet.
R Mount Works well with EF Lenses
By Billy I.
R Mount to EF works Great. Ive had no problems at all.
While the Canon EOS R mirrorless system already comes with four stellar lenses, having the ability to use all the other Canon lenses in your arsenal is the best way to take full advantage of the EOS R mirrorless camera. To help you expand the number of compatible lenses for Canon’s first full-frame mirrorless workhorse, the Mount Adapter EF-EOS R facilitates a seamless connection between any EF or EF-S lens and the new RF lens mount. This lightweight and highly compact adapter, which offers the same dust and weather sealing as the L-series lenses, allows for limitless creativity with your EOS R by giving you full access to the plethora of EF and EF-S lenses available on the market.
Lightweight and compact, the Mount Adapter EF-EOS R connects EF and EF-S lenses to the EOS R camera, exponentially expanding the list of compatible lenses.
Explore the limitless potential of your Canon EOS R camera with the high-quality Mount Adapter EF-EOS R. This durable and reliable adapter is designed to seamlessly connect EF and EF-S lenses to the EOS R camera system, significantly broadening your lens compatibility options.
Engineered for optimal performance, this versatile adapter maintains full communication between the camera and lens, allowing you to control aperture, shutter speed, and other critical settings. Whether you're using your EF-200-400L 1.4x, 24-70L, or 70-200L lens, this adapter ensures flawless operation, as testified by numerous satisfied users.
Ideal for full-frame mirrorless cameras like the Canon EOS R, this adapter is not just a connector, but a gateway to a wider range of photographic possibilities. With its compact and lightweight design, it's easy to carry along on any shoot, making it a must-have accessory for every Canon EOS R camera owner.
Choose the Mount Adapter EF-EOS R for its compatibility with a wide range of Canon lenses and its ability to enhance your EOS R camera system's functionality. Experience the difference in your photography with this reliable, high-quality adapter.