Canon EF to L Mount Smart Adaptor with Variable ND Filter (Fotodiox)
This adaptor will adapt Canon EF mount lenses to Panasonic, Blackmagic & Sigma cameras with the Leica L mount. It has a variable ND filter to help expose in bright light, and the adaptor has electronic contacts for iris control, image stabilization, metadata, and basic stills autofocus. New, the adaptor retails for approximately $299 USD: https://fotodioxpro.com/products/ef-l-fsn-ndt