Extending the range of compatible lenses, this Canon Drop-In Filter Mount Adapter EF-EOS R is a unique lens adapter designed for attaching any EF or EF-S-mount lens to the EOS R mirrorless digital camera. This sophisticated adapter affords compatibility with select A-type drop-in filters, and includes a variable neutral density filter for greater control over your exposure settings. Extending the range of compatible lenses, this Canon Drop-In Filter Mount Adapter EF-EOS R is a unique lens adapter designed for attaching any EF or EF-S-mount lens to the EOS R mirrorless digital camera. This sophisticated adapter affords compatibility with select A-type drop-in filters, and includes a variable neutral density filter for greater control over your exposure settings. The adapter's design extends the ability to use filters with unique lenses that cannot accept filters on the front, and and it also retains full autofocus and image stabilization capabilities of the mounted lens. It is also dust- and water-resistant, making it suitable for use in harsh weather conditions. Shoot with any EF or EF-S lens on your EOS R series camera Canon’s EF-EOS R Drop In Filter Mount Adapter gives you the flexibility to shoot with any EF or EF-S lens on an EOS R mirrorless camera. Add drop in filters to your existing EF and EF-S lenses The Drop in Filter Mount Adapter EF-EOS R adds a Circular Polarizing or a Variable Neutral Density filter to your EF or EF-S lens when shooting with EOS R. Variable ND Filter for daytime long exposures The drop in variable neutral density (ND) filter allows density to be controlled from ND3 – ND500 which is equivalent to 1.5 – 9 f-stops. What's in the box Canon Drop-In Filter Mount Adapter EF-EOS R with Variable ND Filter