Canon Mount Adapter EF-EOS R (New)
Canon Mount Adapter EF-EOS R (New)
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Canon Mount Adapter EF-EOS R (New)

4.7 stars out of 111 reviews
(4.7)|
111 ratings

Key item features

  • Superior Imaging: Maintains the image quality and performance of EF and EF-S lenses when used on EOS R series cameras, ensuring professional-grade results.
  • Broad Compatibility: Enables seamless use of Canon EF and EF-S lenses on Canon EOS R series cameras, expanding creative options with existing lenses.
  • Original Focal Length: Preserves the original focal length of EF and EF-S lenses, providing consistent framing and perspective for photography.
  • Precise Aperture: Retains full aperture control and communication between EF/EF-S lenses and EOS R cameras, allowing precise depth-of-field adjustments.
  • Robust Construction: Features a durable build quality, providing a secure and stable connection between lenses and camera bodies for reliable performance.
  • Seamless Electronics: Offers full electronic communication, supporting autofocus, image stabilization, and other lens functions for a smooth shooting experience.
  • Compact Design: A lightweight, compact lens adapter designed for attaching any EF or EF-S-mount lens to the EOS R mirrorless digital camera.
  • Weather Resistant: Dust- and water-resistant, making it suitable for use in harsh weather conditions without compromising optical quality.
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Current price is $129.00
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Columbus, 43215
Arrives by Mon, Mar 16
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Sold and shipped by Eternal Photo
4.0476190476190474 stars out of 5, based on 84 seller reviews(4.0)
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4.7 out of 5 stars
stars111 ratings87 reviews
How item rating is calculated
  1. 5 stars86% (95)
  2. 4 stars7% (8)
  3. 3 stars3% (3)
  4. 2 stars2% (2)
  5. 1 star3% (3)

Reviews summary

Pros
  • : Adapter fits securely onto camera and lenses.
  • : Built with a sturdy feel and accepts ef-s lenses.
  • : Attaches to camera and lenses seamlessly.
  • : Provides detailed and crisp visuals.
  • : Offers affordable ef lens options.
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Showing 1-3 of 87 reviews

Dec 22, 2025
James
Sold and shipped by6AVE Electronics
5 out of 5 stars review

Verified Purchase

A "Must Have" product if you have EF/EFS lenses!

This is an excellent product if you have a Canon R series mirrorless camera and would like to continue to use your EF as well as EF-S lenses. Here's an interesting point....If you're using this adapter on a Canon FULL frame R series camera with the adapter and are attaching a Canon EF-S lens, the full frame camera senses this and switches into "cropped mode". What this does is temporarily change the full frame camera into an APS-C camera while an EF-S lens is attached to the adapter. Here's an example...If you're using a full frame Canon R5 (45 mp sensor) and want to use an EF-S lens, the result will be a lower resolution image. In "crop mode" the R5 would produce a 17.5 mp image because the crop factor (1.6) is applied to BOTH the vertical as well as the horizontal. The result is 45/(1.6 x 1.6) = 17.5 mp. 17.5 mp is still a sizeable image but you should be aware of the downsizing of the image. This ONLY applies when using a Canon FULL frame R series camera with the adapter and an EF-S lens. There is NO image megapixel loss when using standard EF lenses with the Canon R series cameras and the adapter.

Helpful?15KBMS85VA4P960120845
Oct 7, 2020
BDP
5 out of 5 stars review

Seller Verified Purchase

My EF lenses are better than ever!

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.

Review from usa.canon.com
Helpful?15KBMS85VA4P960120845
Dec 23, 2019
LJ Fowler
5 out of 5 stars review

Seller Verified Purchase

Easy Way of Using My Best Lenses

Does a fine job and was a free add-on. I haven't missed the "manual ring" so happy I didn't spend more, nor did I want to mess with filters behind the lenses as the other pricier choice. Yes it adds a little weight but doesn't effect the autofocus like extension tubes with my telephoto zooms so I'm happy with it. Since I shoot with the EOS R only when need silent mode and use my EOS 5 for other situations there is need for only one adapter ring.

Review from usa.canon.com
Helpful?15KBMS85VA4P960120845