Meike Drop-In Filter Mount Adapter EF to EOS-R with Variable ND FilterMeike Drop In Filter Mount Adapter EF to EOS R with Variable ND Filter A smart option for users of EOS R mount cameras who want to use EF mount lenses with the added benefit of a variable neutral density filter. The drop in filter system quickly and easily slots lens modifiers at the rear of the lens, letting photographers use the same size filters regardless of the size of the lens, reducing the amount of gear you need to carry with you. Built with a