Canon Drop-In Filter Mount Adapter EF-EOS R With Drop-in Variable ND Filter AConnect 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 variable ND filter, and because it's one size fits all, there's no need to purchase multiple filters to fit various lens diameters. Drop In The Drop in Filter Mount Adapter EF EOS R's