The Tilta 72mm Adapter Ring for Tilta Mirage for the Tilta Mirage Matte Box allows you to mount the system directly to a photography lens with a front diameter of 72mm.
These adapter rings screw into the filter threads on your lens and allow you to clamp the Mirage Matte Box directly onto the adapter.
The V2 versions do not feature a front filter thread which helps limit potential vignetting on wider lenses, however, they will not accommodate circular screw on filters.