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Availability:
In Stock.
Arrives
Thursday, Feb 5
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Features
- Standard Mount Adapter allows EF/EF-S lens compatibility with EOS RP, EOS R, EOS R6, and EOS R5 Cameras
- Exterior design matched to EF lenses
- Dust- and water-resistant
- Metal mount on both Lens and camera sides provides rugged flexibility
Description
The new Canon standard mount Adapter allows for EF/EF-S lens compatibility with the new EOS R mirrorless Digital Camera system.
Compatible Mountings: Canon RF
Aspect Ratio: 32
Photo Sensor Technology: CMOS
Supported File Format: RAW
Image Stabilization: Digital
Maximum Focal Length: 105 Millimeters
Maximum Aperture: 20 Millimeters
Brand: Canon
Model Name: CANON MOUNT ADAPTER EF-EOS R
Maximum Webcam Image Resolution: 30.3 MP
Product Dimensions: 2.8 x 2.8 x 0.9 inches
Item Weight: 3.9 ounces
Item model number: 2971C002
Is Discontinued By Manufacturer: No
Date First Available: September 4, 2018
Department: Photography
Manufacturer: Canon
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Feb 5
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
I just upgraded to an R6ii from a 5Diii, and needed this adaptor to use my EF-L lenses with the new camera. I was nervous my lenses would have a loss in quality, but on the contrary they are actually performing better than ever. A lot of that has to do with the camera, because the R6ii is incredibly fast, but it's amazing to have an adaptor that gives no loss in quality and just flawlessly connects the EF lenses to the R system. I have had ZERO issues with connection, everything connects just like a lens connects straight to the camera. I have two L lenses, so I just keep the adaptor on the camera body and swap out the lenses to the adaptor as if they were connecting straight to the camera. The adaptor does add length, obviously, but the weight isn't that significant. If you're like me and have a heavy 70-200 lens, it works perfectly, but because of the extra length on an already long and heavy lens, I am careful when carrying because I don't want it just dangling on the adaptor/camera. The adaptor does connect tightly with no wiggle though, so it is safe if you do let the camera hang to your side with the lens, I'd just take precaution. Better to be safe than sorry. Honestly, I couldn't be happier. For the price, this is truly a great deal. $100 to make my expensive L lenses work with the new camera? Perfect! Definitely beats having to upgrade to even more expensive lenses right now. I did a lot of research on the three different Canon brand adaptors, and out of the three, this one was the best choice for me and was the cheapest as well which was a plus! If you're on the fence between the three different adaptors, I'd really recommend this one. Unless you really need an extra control ring (that's awkwardly placed), or drop in filters (that are very expensive), this is such a great price and works flawlessly!
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Reviewed in the United States on July 24, 2023 by Destiny Marie Destiny Marie
Works great to transfer my EF lens onto my mirrorless camera. It has contacts so my lens motors work for AF.
Reviewed in the United States on January 10, 2026 by James
I recently bought a lens for my Canon R7 without realizing it wasn’t compatible — rookie mistake. Thankfully, this Canon EF-EOS R adapter saved the day. Once I attached it, the lens worked flawlessly, with fast autofocus and full functionality. The build quality is solid, and it feels like a native part of the camera once mounted. No lag, no issues, just smooth performance. If you’re transitioning to the R series and want to keep using your EF lenses, this is a must-have. 10/10 — highly recommended!
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Reviewed in the United States on July 28, 2025 by José Rodríguez
Had an off brand adapter that worked fine between my old EF lens and my R8 just to try it. But, before my trip to France I bought an EF 70-300 IS II USM for my R8 and bought this to make absolutely sure I would not have any adapter problems ruining my photos. It works. And though it is more expensive that the off brands, the peace of mind was worth it to me.
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Reviewed in the United States on September 17, 2025 by Jason
Ordered new EF-EOS adapter it was opened and missing and with wrong back cap on the back instead of RF back cap it had EF probably the one who had it put the wrong cap adapter itself was fine and looked like new, returned and asked for a replacement, it came few days later that was new as it should with the correct adapter rear cap for RF and little bag for ef adapter itslef and brand new very happy with it, test it wil all my EF lenses it worked great, fast autofocus, compatible with my sigma 35 mm and 70-200 plus all EF canon lenses, its a great option so I dont need to buy other RF lenses. The only downsize i would say is that is made in Taiwan, I wish it was made in Japan since they tend to have higher quality but still under Canon so it should be ok. Make sure once you order to have all accessories since some are returns even though they advertise as new, make sure you have EF front cap with canon sign and RF back cap so it will fit when you pack, as well should have am adapter bag wraped in plaastic with canon manual and USA warranty on it, if you find all these you are good to go. Dont buy other adapters this is kind of cheap and is good quality and value using it with your EF lenses. Highly Recommended
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Reviewed in the United States on June 8, 2024 by Leftian
I was gifted a Canon R7 mirrorless camera and have a lot of EF lenses. This is a great adapter to allow me to use my pre-existing lenses on the new camera body. It fits perfectly, it is seamless and easy to use. Picture quality has been excellent and it is a good size that is not too bulky. For the price, it adds a great value for what I have already. Autofocus is quick and the weight is minimal. I am very pleased with its performance.
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Reviewed in the United States on February 16, 2025 by Eagle Vision
I was so happy to see that this worked perfectly with my Canon R6 II and my EF lenses. I used it with both my ef 70-200 F2.8 IS. And my ef 24-70 f2.8. The auto focus is not affected in any way. It works with the AI focus and all. The Image stabilization was also not affected. My only regret is no paying the extra to get the model with the drop in filter slot. That seems like a great option now that i know how well this product works. Highly recommend it if you have a R body and EF glass.
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Reviewed in the United States on April 10, 2025 by Carlos
I bought a telephoto photo lens only to discover that I needed the adapter to be able to attach the lens onto my camera. A little frustrated I went online and I searched and I found that this company had a fair price and the lens arrived in two days. I couldn’t have been happier and it fits perfectly. Seems like a solid and reputable business.
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Reviewed in the United States on September 9, 2025 by FullOfSurprizes