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Canon

Canon Mount Adapter EF-EOS R

  • Based on 2,397 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Oct 13 – Nov 12
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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


Brand: Canon


Model Name: CANON MOUNT ADAPTER EF-EOS R


Built-In Media: CANON MOUNT ADAPTER EF-EOS R, Camera Cover R-F-3, LENS DUST CAP RF, Soft Case


Are Batteries Included: No


Model Number: 2971C002


Remote Included: No


Model Series: EF-EOS R


Global Trade Identification Number: 86


UPC: 013803304886


Item Type Name: Canon cameras us ef-eos r new mount adapter, black, full-size (2971c002).


Item Height: 0.9 inches


Manufacturer: Canon


Unit Count: 1.0 Count


Warranty Description: 1 Year Manufacturer Limited Warranty


Screen Size: 3.15 Inches


Display Type: LCD


Display Fixture Type: Fixed


Has Color Screen: Yes


Memory Slots Available: 1


Write Speed: Up to 8 fps or around 10-60 MB/s


Auto Focus Technology: Phase Detection


Focus Features: Phase Detection Autofocus


Focus Type: Fixed Focus


Focus Mode: Single-Servo AF (AF-S)


Autofocus: Yes


Aspect Ratio: 32


File Format: RAW


Effective Still Resolution: 30.3 MP


JPEG Quality Level: Normal


Supported Image Format: RAW


Total Still Resolution: 3E+1 MP


Maximum Focal Length: 105 Millimeters


Lens Type: Teleconverter


Zoom: Optical Zoom


Camera Lens: Canon EF-EOS R Mount Adapter


Minimum Focal Length: 20 Millimeters


Real Angle Of View: 12 Degrees


Focal Length Description: teleconverter


Exposure Control: Program (P) mode


Self Timer: 10 Seconds


Connectivity Technology: USB


Wireless Technology: Wi-Fi


Total USB Ports: 1


Total Video Out Ports: 1


Shooting Modes: Automatic


Digital-Still: Yes


Movie Mode: Yes


Image Capture Type: Video


Night vision: No


Compatible Mountings: Canon RF


Sensor Type: CMOS


Image stabilization: Digital


Maximum Aperture: 20 Millimeters


Photo Sensor Resolution: 30.3 MP


Photo Sensor Size: Full Frame (35mm)


Maximum Shutter Speed: 1 seconds


Minimum Shutter Speed: 1 Seconds


Form Factor: Mirrorless


Special Feature: Lightweight


Color: Black


Item Weight: 0.24 Pounds


Video Resolution: 1080p


Viewfinder: Electronic


Flash Modes: Various flash modes supported


Camera Flash: no flash


Skill Level: Professional


Specific Uses For Product: Videography


Compatible Devices: Canon EF lenses


Continuous Shooting: 60 fps


Aperture modes: f/22


Flash Sync Speed: 1/200


Video Capture Format: MP4


Water Resistance Level: Water Resistant


Frame Rate: 30 fps (4K), 60 fps (Full HD)


Mount Type: Canon RF


Item Dimensions D x W x H: 3"D x 3"W x 1"H


Minimum Aperture: 20 Millimeters


Warranty Type: Limited


Shutter Type: Rolling Shutter


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Oct 13 – Nov 12

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.

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Top Amazon Reviews

    • Best of the three Canon adaptor versions IMO! And cheapest!
Review Image by Destiny Marie Destiny Marie
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! ... show more
Reviewed in the United States on July 24, 2023 by Destiny Marie Destiny Marie
    • Perfect Solution for My EF Lens on R7
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! ... show more
Reviewed in the United States on July 28, 2025 by José Rodríguez
    • Perfect accessory! Works Great.
Works amazing. Lightweight! Perfect accessory.
Reviewed in the United States on August 8, 2025 by michelle bates
    • Works perfect
Works perfectly to mount normal ef lenses to an eos R
Reviewed in the United States on August 5, 2025 by W. Burke
    • Works great! EF on RF cameras do a very good job.
Works great! EF on RF cameras do a very good job. BUT, cheap EF lenses are no better on mirrorless cameras.
Reviewed in the United States on July 17, 2025 by george
    • Perfect gadget
doesnt weight that much. picture quality remains the same. worth the money. autofocus works perfect. easy to use. build quality is good.
Reviewed in the United States on August 21, 2025 by Opulence Plus Photography
    • Just wonderful for the transition
We bought this part as looked to move to Canon MIrrorless bodies. The part works as advertised. Our existing full frame lenses work well on the new camera. We can slowly invest in RF lenses at our pace because this work well.
Reviewed in the United States on September 1, 2025 by Dan F
    • Great Adapter No Compatibility Issues
Great adapter! I was purchasing the EOS R6 Mark II for a photo shoot in two days, but the local shops did not have the adapter. I was able to purchase off Amazon and get overnight shipping to make my shoot in time! Highly recommend using the legacy EF lenses from your Canon DSLR. No compatibility issues and save money over the R lenses if you have a collection you used on your Canon 5D for instance. The adapter doesn't impact the picture quality or autofocus in any way. ... show more
Reviewed in the United States on August 2, 2025 by MCC

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