This adapter allows you to use any 50mm lens with the Leica R mount to fit on Leica M system cameras (MP, M9, M8, M7, M6, M5, etc.). Made from high quality alloy, simply put your Leica R mount 50mm lens on the adapter ring and set up the focus ring at the infinity position on your lens, then you can use the adapter’s focus ring to do the rangefinder focusing via camera’s viewfinder (The rangefinder function works with 50mm lenses only). If you want to make the Macro shot, turn on the live view function and put the focus ring at minimum focus position on your lens, then use the focus ring on the adapter to adjust the focus. You might need to calibrate the adapter ring by yourself, a small allen key to finely tune the focusing calibration, you can find the article to show you how to calibrate 7Artisans and TTArtisan lenses to your digital camera on photo rumors. It’s the same for this adapter. Cameras are not included in the sales.