A drop-in variable neutral density filter to reduce the amount of light entering the camera - ND effect can be adjusted from ND 2.5 to ND 500 equivalent* - great for filmmakers wanting to shoot at large apertures and landscape photographers shooting at long shutter speeds. This filter fits with the Filter Mount Adapter, which lets you connect your EF or EF-S lens to the EOS R system. Benefits A drop-in filter to modify exposure and create dreamy, blurred motion effects, reducing the amount of light entering the camera Ideal for filmmakers wanting to shoot at large apertures and landscape photographers shooting at long shutter speeds ND effect can be adjusted from ND 2.5 to ND 500 equivalent* Metal lens mount on both the back and front of the adapter Exterior finish matches the finish of both camera body and lens What\'s in the box Drop-In Variable ND Filter A Compatibility Drop-In Filter Mount Adapter EF-EOS R EOS R EOS RP