


Canon 2971C005 Bayonet adapter EF-EOS R. , black
Short Product Overview
The Canon 2971C005 EF-EOS R Bayonet adapter seamlessly connects your existing Canon EF and EF-S DSLR lenses to the EOS R mirrorless system, unlocking maximum versatility without compromising performance. This official, black adapter maintains full electronic communication, supporting high-speed autofocus and image stabilization for professional-grade results. Built to last, its dust and splash-proof construction ensures reliable integration with your RF mount camera.
- Effortlessly integrate EF and EF-S lenses with EOS R mirrorless cameras.
- Maintains full electronic function for high-speed AF and Image Stabilization.
- Durable, professional-grade, dust and splash-proof construction.
- Seamlessly integrates lenses without loss of optical quality.
£122.50 – £501.49Price range: £122.50 through £501.49

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Description
Canon EF-EOS R Bayonet Lens Mount Adapter (2971C005): Seamlessly Connect Your EF & EF-S Lenses to the EOS R System for Maximum Versatility
Unlock the full potential of your Canon mirrorless camera with the indispensable Canon EF-EOS R Bayonet Adapter. This official Canon accessory, model 2971C005, is the essential bridge that allows you to use your extensive collection of existing EF and EF-S DSLR lenses on any EOS R system camera (including EOS R3, R5, R6, R, and RP). Experience zero compromise on image quality, speed, or functionality. Engineered to maintain full electronic communication, this adapter supports complete autofocus and image stabilization features, giving your favorite lenses a new life on the revolutionary RF mount. Built to withstand the demands of professional shooting, the adapter is dust and splash proof, ensuring reliable performance in various conditions. Maximize your creative options and save on new gear by integrating your classic Canon glass with the future of mirrorless technology.
Key Features
- Effortlessly mount Canon EF and EF-S DSLR lenses onto EOS R Series mirrorless cameras.
- Maintains full electronic functionality including high-speed Autofocus and Image Stabilization.
- Durable, professional-grade construction that is dust and splash proof.
- Seamless integration without any loss of optical quality.
- Allows for use of EF-S lenses with automatic cropping for optimal image sections.
Important Information
- Model Number: Canon 2971C005 (EF-EOS R Standard Adapter).
- Color: Black.
- Compatible with all Canon EOS R system cameras (RF Mount).
- Lens Type: Lens accessory/Bayonet adapter.
- Includes: Bayonet adapter EF-EOS R, camera housing cover R-F-3, lens back cover RF, case, user manual.
Why Choose Think Assemble
- Quality Assurance: We only supply official, genuine Canon products for guaranteed performance.
- Fast Shipping: Get your essential gear quickly with our reliable shipping process.
- Expert Support: Access knowledgeable customer service ready to assist with your technical questions.
Specification
Overview
| Weight | 230 g |
|---|---|
| Dimensions | 1290 × 1180 × 820 cm |
| Package Dimensions L x W x H |
12.9 x 11.8 x 8.2 centimetres |
| Package Weight |
0.23 Kilograms |
| Product Dimensions L x W x H |
13 x 12 x 8 centimetres |
| Item weight |
110 Grams |
| Brand | |
| Colour |
Black |
| Included components |
1 |
| Model year |
2018 |
| Plug profile |
Canon |
| Part number |
EF-EOSR |
| Water Resistance Level |
Water Resistant |
| Zoom Type |
prime |
| Lens Design |
Prime |
| Photo Filter Effect Type |
Ultraviolet |
| Focus type |
Auto Focus |
| Aperture Modes |
f1.2-32 |
| Style |
Adapter |
| Photo Filter Thread Size |
58 |
| Guaranteed software updates until |
unknown |
| Item model number |
2971C005 |
| Batteries |
1 AA batteries required. |
| Date First Available |
7 Sept. 2018 |
| Manufacturer |
Canon |
| Pattern Name |
Single |
| Style Name |
Adapter ,Adaptor with plug-in filter (C-PL) ,Adaptor with plug-in filter (V-ND) |
Customer Reviews
10 reviews for Canon 2971C005 Bayonet adapter EF-EOS R. , black
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robbie –
The quality is really good don’t mind paying more for quality like this solid works good no issues yet helps make My r50 look bigger and helps balance it up with it being a small camera,yes worth the extra dosh you’ll not b disappointed if you get one good stuff thanks cannon
Nick S –
Hello…i’ve had this adapter for a while now and it works a treat with my EF lenses, primes and zoomy ones. Image quality is spot on Theres no wobble and everything attaches solidly. As far as i can say its weather sealed, was out in some torrential rain in the North East and there were no misfunctions. To those who say it makes the lens stick out more (of course it does its an adapter after all) but not in any way thats going to effect photographs or moving about, no way. Its saved me sooo much money not having to sell my existing EF lenses to buy replacements for my RF camera. Good Stuff….Bye.
MrBallistic –
Doesn’t seem to slow AF down in any way and feels solid.
Mike McRory-Wilson –
Simple and effective coupler at a very reasonable price (by Canon standards). Rapid service.
allan clive fox foxy –
Very good works floorless on my canon R7/ef400.5.6 L
Think Assemble Customer –
Excellent and money-saving piece of kit that adds only about 1.5cms to the overall length of the camera. Great quality images as well. Highly recommended.
Elle –
I only bought my new Canon EOS camera once I found this adapter.My previous DSLR lenses added up to a lot of money and I wasn’t going to lose that by selling them & replacing them when I upgraded to mirrorless.The adapter fitted onto the EOS in seconds, and the DSLR lenses fitted perfectly with the adapter.Adding it to the EOS is something most people wouldn’t notice, except fellow photographers who notice every detail of every camera. So, in terms of how it looks ? Just right in my opinion. There’s no distraction with how the camera looks.
Ian scott –
Tried other non canon versions just to save money but they annoyingly lasted a short time. So decided to buy the correct item. Fits perfectly well and seems ok so far.
Think Assemble Customer –
Canon eosr nd filter adapter
This Nd filter small and the best
Elvis Tan K. H –
Great Compatible
Works well with Other EF lenes as well.