Upgrade your kit with our customizable Kolari Empty Drop-in Filter for For EF-EOS R Lens Adapter. It’s designed to allow you to insert the glass from any threaded 52mm filter ring into our drop-in filter frame. You can also add support to make the empty drop-in frame compatible with the glass from 48mm (2”) and 49mm threaded filter rings. All of our Drop-In filters are compatible with Canon’s and Meike’s Drop-In adapter system as well as our own.