CANON EF EOS R Drop in Filter Mount Adapter with Variable ND A, Black

Amazon

Use existing lenses with EF and EF-S bayonet with a Canon EF-EOS R camera The bayonet adapter with drop-in filter is used with special optical plug-in filters Available with variable ND filter or circular polarising filter Built for professional use Box contents: bayonet adapter EF-EOS R with insertion filter; drop-in variable ND filter A; camera housing cover R-F-3; lens back cover RF; case; user manual (English language not guaranteed)

Currys

With the Canon EF-EOS R Drop-in Filter Mount Adapter you can give your EOS R camera new lenses. It is compatible with EF and EF-S lens type so you can really upgrade your photography.In addition, the adapter includes a variable neutral density filter. It's perfect for filmmakers who want to adjust amount of light entering the camera while shooting at large apertures.