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HomePhotographyLens AccessoriesGeneral Lens AccessoriesLens Mount AdaptersCanon 2971C002

Canon Mount Adapter EF-EOS R

BH #CAMAEFRF • MFR #2971C002
478 reviews
Canon Mount Adapter EF-EOS R
Key Features
  • Canon EF/EF-S Lens to EOS R Camera
  • Maintains AF and Image Stabilization
  • Dust- and Water-Resistant
Extending the range of compatible lenses, the Canon Mount Adapter EF-EOS R is a lightweight, compact lens adapter designed for attaching any EF or EF-S-mount lens to the EOS R mirrorless digital camera. This simple adapter retains full autofocus and image stabilization capabilities and contains no optical components, thereby maintaining the original optical quality of the mounted lens. It is also dust- and water-resistant, making it suitable for use in harsh weather conditions.
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$99.00
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Canon 2971C002 Overview

Extending the range of compatible lenses, the Canon Mount Adapter EF-EOS R is a lightweight, compact lens adapter designed for attaching any EF or EF-S-mount lens to the EOS R mirrorless digital camera. This simple adapter retains full autofocus and image stabilization capabilities and contains no optical components, thereby maintaining the original optical quality of the mounted lens. It is also dust- and water-resistant, making it suitable for use in harsh weather conditions.

UPC: 013803304886

Canon 2971C002 Specs

Adapter
Camera MountCanon RF
Lens MountCanon EF, Canon EF/EF-S
Physical
Dimensionsø: 2.8 x H: 0.9" / ø: 71.2 x H: 24.0 mm
Weight3.88 oz / 110 g
Packaging Info
Package Weight0.6 lb
Box Dimensions (LxWxH)5.15 x 4.65 x 3.25"

Canon 2971C002 Reviews

it works....

By Victor G.
Rated 5 out of 5
Date: 2022-07-02

it works very well on short lens

Canon Mount Adapter EF-EOS R

By Kristin
Rated 5 out of 5
Date: 2022-06-21

Works perfectly. Good option for transitioning from EF to RF glass.

Love it!

By Leina
Rated 5 out of 5
Date: 2022-06-21

Works perfectly! So happy to be able to use all my old lenses on my new R5!

Working good

By Phat
Rated 5 out of 5
Date: 2022-06-21

Fits tight, no play

Works as Advertised

By Jimmy
Rated 5 out of 5
Date: 2022-06-21

Very smart of Canon to make this 1st-party. Good build quality, very sturdy. Saved me a lot of time and money being able to adapt all my EF glass, perfect for any Canon users looking to upgrade to an RF camera.

Works perfectly

By David
Rated 5 out of 5
Date: 2022-06-21

I have had a 3rd-party adapter ring on my R5 since I bought it in September 2021. The camera exhibited a wide range of weird behavior during this time, including heavy battery drain even when turned off, lock-ups that could only be cleared by removing the battery, etc. I had a crazy idea that maybe the adapter ring was the culprit, so I bought the Canon ring just to give it a try. Bingo. All the problems went away immediately. The Canon ring works perfectly, the images are sharp, and now the camera is working properly as well. Lesson learned: no more 3rd-party adapter rings!

Works like a charm

By Wayne
Rated 5 out of 5
Date: 2022-06-30

I bought this adapter to use my L series lenses on my Canon R. It works great and full function with all my lenses.

Staying on my 24-70 2.8L

By Lenn
Rated 5 out of 5
Date: 2022-06-29

Bought this EF-RF adapter for my Canon R6 to adapt my EF 24-70 2.8L. Works great. They do offer two other models that are a little more expensive. One has the new programmable RF control ring and the other has a ND or Polarizer filter holder built into it.

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What is the difference between this mount ...

What is the difference between this mount converter and the Control Ring Mount Adapter?
Asked by: Katie
One has the control ring which is useful but not necessary, and one is without.
Answered by: Kenneth
Date published: 2021-10-10

Is there any rotational play/wiggle/slack with EF ...

Is there any rotational play/wiggle/slack with EF lenses with this adapter, or is the adapter tight and doesn't have any play?
Asked by: Thatcher
ABSOLUTLEY NOT! On multiple lenses from 16-35mm ef to my 400mm f2.8. I bought 2 since I have a lot of L series Ef lenses! Image quality up to 24-36 enlargement does not seem affected.
Answered by: Gerold
Date published: 2021-09-15

I have a EF mount. Can this be used on that to ...

I have a EF mount. Can this be used on that to use my efs lenses?
Asked by: Matt
Yes. EFS lenses mount just fine and work great on the EOS R.
Answered by: Dale
Date published: 2020-08-07

Will this Adapter be compatible with the R5 R6 & ...

Will this Adapter be compatible with the R5 R6 & EF L lenses?
Asked by: Anonymous
Yes, I use it on an EOS and it works great. Canon also makes additional adapters for EF lease on the EOS R cameras, one that adds a control dial and one that allows for drop-in filters.
Answered by: Kevin
Date published: 2020-08-21

will this work with the R3 ?

will this work with the R3 ?
Asked by: Sherman
Yes
Answered by: Erich
Date published: 2021-08-04

Can I use this adapter on a Canon mark 5d iv to ...

Can I use this adapter on a Canon mark 5d iv to mount Canon RF 35mm f/1.8 IS Macro ?
Asked by: karla
No. You are not able to adapt RF lenses to EF cameras due to the significant difference in flange focal distance. This adapter is for the reverse (EF lenses to RF cameras).
Answered by: Jeremy
Date published: 2021-10-31

The EF Sigma 35mm 1.4 Art is loose when attached ...

The EF Sigma 35mm 1.4 Art is loose when attached to this adapter. There is some play when handling the lens while it is attached. Is this an isolated issue or is this an issue with all EF lenses when attached to this adapter?
Asked by: Tarik
The adapter was designed to mount the Canon EF lenses on it with a close tolerance so there would me no movement between the lens and the adapter. Each manufacturer will have a "different" tolerance than what the Canon tolerance will be and that could be the problem. You might try your other "third party EF mounts" and see if they have the same "looseness" as your Sigma 35mm f1.4 Art lens. If they are tight then it is the lens and not the EF-EOS R adapter.
Answered by: Robert
Date published: 2021-03-23

Will the EF-EOS R mount adapters work with Canon ...

Will the EF-EOS R mount adapters work with Canon 1.4x or 2x extenders, assuming the EF lens is compatible with the extender? (Seems like it would, but I can't find an official answer or someone who's tried it.)
Asked by: David
Yes it will work
Answered by: vilson
Date published: 2021-01-19
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