The Canon Mount Adapter EF-EOS R lets you connect your existing EF or EF-S lens to your EOS R system camera while maintaining the same levels of performance and functionality as on your DSLR. Its perfect for photographers who already have a number of EF lenses. This adapter comes with a variable neutral density filter. You can adjust the ND effect from ND 2.5 to ND 500, meaning you can reduce the amount of light entering the camera. This allows you to control exposure in bright conditions, achieve motion blur in daylight and use wider apertures for portraits. Canon EOS R adapters are built for tough environments and are weather sealed against dust and moisture. Finally, as the adapter is lightweight approximately 110g it means that it doesn't add much weight to your lens.BenefitsAllows you to use your EF and EF-S lenses on a Canon EOS R camera body, perfect for any photographer with a number of EF lenses in their kit bag who is looking to effortlessly upgrade to the Canon mirrorless