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Drop-In Filter Mount Adapter EF-EOS R with Drop-In Variable ND Filter A

Mount Adapters

Item Code: 3443C002AA
Be the Revolution - EOS R System

The EOS R System expands the EOS lineup with a full-frame mirrorless camera, new RF lenses, optional mount adapters for compatibility with EF/EF-S lenses, and a game-changing RF lens mount at the heart of it all. Learn more.


  • Mount Adapter Allows EF/EF-S Lens Compatibility with the EOS R Camera.
  • Drop-in Filter Adapter Allows Use of Variable ND Filters.
  • Dust- and Water-resistant.
  • Exterior Design Matched to EF Lenses.
  • Metal Mount on Both Lens and Camera Sides Provide Rugged Flexibility.

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Mount Specification

Canon EF mount (camera side)
Canon RF mount (lens side)

Usable Lens

Canon EF lenses
Excludes RF lenses, EF-M lenses, CN-E lenses (EF cinema lenses)

Usable Camera

Canon EOS R camera

Dust- & Water-resistance

Provided (rubber ring)


Φ2.88 x 0.97 in. / Φ73.2 x 24.7mm (adapter only)


Approx. 4.3 oz. / 121g (adapter only)

Compatible Supplies & Accessories

Canon offers a wide range of compatible supplies and accessories that can enhance your user experience with you Drop-In Filter Mount Adapter EF-EOS R with Drop-In Variable ND Filter A that you can purchase direct. Scroll down to easily select items to add to your shopping cart for a faster, easier checkout. Visit the Canon Online Store



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White Papers

EOS R System White Paper
Read this informative white paper for a technical view on the new EOS R System and all it has to offer.

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Reimagine Optical Excellence

See how Canon’s new EOS R System can help reimagine optical excellence and help capture the beautyof the world.

Discovering Canon’s new EOS R System

Get to know Canon’s new EOS R System that enables maximum optical performance and opens up an exciting possibility to anyone wanting to capture creative images.

Introducing Canon’s RF Lenses

Discover Canon’s new RF lenses and EOS R camera’s features that help to deliver incredible possibilities.

Canon EOS R System Operability

Watch how Canon’s new EOS R system operations provide a high level of customization options for fast, intuitive shooting.

Canon EOS R Sample Video-Lake Natron

Watch and discover why the new EOS R System is set to make an impression on photographers and storytellers today and far into the future.

Discover the New Canon EOS R System with Rudy Winston

Find out all the great benefits and future possibilities the EOS R System has to offer with this insightful video hosted by Canon U.S.A. Technical Advisor, Rudy Winston.

World's Longest Slip and Slide out of a Cargo Airplane!

Watch an epic video of skydiving slip and sliders filmed by Devin Graham and crew using the new Canon EOS R.

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† Prices and specifications subject to change without notice. Actual prices are determined by individual dealers and may vary.

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