The Sigma MC-21 Mount Converter (Canon EOS EF to Leica/Panasonic L Mount) allows compatibility between Sigma EF-mount lenses and L-mount mirrorless bodies. It supports fast and accurate AF-S autofocus and works in conjunction with in-camera stabilization and in-lens stabilization. Additional features: LED compatibility indicator; flocked interior to prevent reflections; transmits Exif data; removable tripod socket; can be updated with optional USB docking station.
Per Sigma, this Mount Converter/Lens Adapter is compatible with a select number of Sigma's own EF-mount lenses, and may or may not be suitable for use with other manufacturers' EF-mount lenses.
