The Canon EF-EOS R Control Ring Mount Adapter lets you connect your existing EF or EF-S lens to your new EOS R system camera. Canon engineers have ensured that you will maintain the same performance and functionality as on your DSLR. This adapter is fitted with a customisable control ring that lets you control your camera without your eye leaving the viewfinder. Canon EOS R adapters are built for tough environments and are weather-sealed against dust and moisture, while the lightweight (130 g) design is perfect for use on the go.