Sigma MC-21 Mount Converter/Lens Adapter (Sigma EF-Mount Lenses to L-Mount Camera) SQUARE FILTERS have a high resistance to

have a high resistance to shocks and drops

and whisper-quiet autofocus with outstanding subject tracking

and Versatile Prime for Stunning Still and Video

Fits: GoPro or similar action video cameras

Sigma MC-21 Mount Converter/Lens Adapter (Sigma EF-Mount Lenses to L-Mount Camera) SQUARE FILTERS have a high resistance toThe Sigma MC 21 Mount Converter Lens Adapter has been designed so that photographers with existing Sigma EF Mount lenses can be mounted onto any L Mount mirrorless camera bodies such as the latest Panasonic S1 S1R cameras. The Sigma MC 21 Mount Converter Lens Adapter still maintains full lens performance, including auto exposure and autofocus in AF S mode, as well as in camera correction, and even image stabilization technologies letting you freely