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Drop-In Filter Mount Adapter EF-EOS R with Drop-In Circular Polarizing Filter A

Mount Adapters

Item Code: 3442C002AA


  • Mount Adapter Allows EF/EF-S Lens Compatibility with the EOS R Camera.

  • Drop-in Filter Adapter Allows Use of Circular Polarizing 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 Circular Polarizing 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 - A New Lens-Camera System

53.09 MB

Software Development Kit (SDK)

The Canon EOS Digital Camera Software Development Kit (EDSDK) enables developers to integrate select Canon cameras directly into their software application solutions, giving them access to remote camera control and communication functionality of the camera. There are two versions of the EDSDK compatible with Windows or Macintosh.

The Software Developer Kit is provided free of charge and can be found at DeveloperCommunity.usa.canon.com.

To learn more please visit the Canon Developer Community site and register to download Canon’s SDKs.

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

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Introducing Canon’s RF Lenses

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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.

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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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