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.BenefitsA drop-in filter to modify exposure and create dreamy, blurred motion effects, reducing the amount of light entering the cameraIdeal for filmmakers wanting to shoot at large apertures and landscape photographers shooting at long shutter speedsND effect can be adjusted from ND 2.5 to ND 500 equivalent*Metal lens mount on both the back and front of the adapterExterior finish matches the finish of both camera body and lensA 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 wantin