Canon Drop-In Filter Mount Adapter EF-EOS R with Circular Polarizing Filter
Canon SKU: 3442C002 | Helix SKU: CA3442C002
Overview
Connect an EF or EF-S lens to your EOS R camera using the Drop-in Filter Mount Adapter EF-EOS R, expanding your available lens options while also providing the ability to add a drop-in filter to your photographic endeavors. This drop-in filter adapter lets you utilize a circular polarizing filter, and because it's one size fits all, there's no need to purchase multiple filters to fit various lens diameters. The Drop-in Filter Mount Adapter EF-EOS R's matching design means smooth connections while a rugged, dust- and water-resistant construction adds to its flexibility, making it easy to have a choice of lens and filter for virtually any shooting situation.
- 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.
Mount Adapter
| 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) |
| Dimensions | Φ2.88 x 0.97 in. / Φ73.2 x 24.7mm (adapter only) |
| Weight | Approx. 4.3 oz. / 121g (adapter only) |
Drop-in Filter Mount Adapter EF-EOS R with Circular Polarizing Filter A 
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