The Sigma MOUNT CONVERTER MC-21 is a converter that allows you to use Sigma SA mount lenses on L-mount camera bodies. By attaching the MC-21, you can increase the freedom of choice for L-mount cameras and lenses, greatly improving the expandability of the L-mount system. Body side: L-mount (SIGMA/Leica/Panasonic) Lens side: Sigma SA mount *Please check the website for compatibility with L-mount bodies other than those made by Sigma. All included accessories at the time of purchase (as shown in the image)