Canon Lens EF-EOSRFILTERCPL Mount Adapter with drop in CPL filter

• Viewfinder display of aperture, zoom and distance. (Distance display requires lens which supports distance information.)
• Auto exposure.
• Assignable function button.
• Supports image stabilization (IS) lenses.
• Power is supplied by camera body. No external power source is required.
• Adapter firmware is user-upgradable through the built-in micro USB port.

To clear up any potential confusion, this is NOT Sony Alpha, but Alpa of Switzerland. You will most likely be using the Kern Macro Switar 50mm f/1.8 or f/1.9 apochromat lens on this adapter.