Sigma EF Lens To L-Mount Camera. The Sigma MC-21 Canon EF Lens to L-Mount Adapter allows you to use Sigma EF mount lenses with the Panasonic Lumix DC-S1 DC-S1H, DC-S1R, Sigma fp, Leica SL2, and SL2-S cameras, on which it offers full-frame coverage.

Electronic Communication. It gives full control of aperture when shooting in A and M exposure modes, or lets the camera control aperture if shooting in P or S exposure modes. Not only do you have aperture control, but it’s also embedded in the EXIF data. The Sigma adapter also supports the Image Stabilization function of compatible lenses, allowing you to shoot at slower shutter speeds and help eliminate camera shake. However, do note that in-lens Optical Stabilization cannot be used in conjunction with in-body sensor stabilization.

Powered by the Camera Body. This adapter doesn’t require any additional power source. On top of that, the adapter’s built-in LED immediately tells you whether or not the mounted lens is compatible.

Built-In Autofocus. This adapter gives you fast, accurate autofocus in AF-S mode. Please note that autofocus is not compatible with AF-C mode, that you can’t use continuous autofocus when shooting video, and that you can’t use Touch autofocus with this adapter.

Limited Compatibility. The MC-21 Adapter only officially supports a select number of Sigma’s Global Vision line of lenses. We’ve listed many in the Recommended section on the left-hand side of this page, but you can also find a table of supported lenses here.