Blackmagic Design URSA Cine Mount EF

• Canon EF mount lens to Blackmagic Design cameras with M43 mount, specific for BMPCC4K.
• Increase maximum aperture by 1-stop. (with a maximum output aperture of f/0.9).
• Increase MTF.
• Makes lens 0.71x wider.
• Patented 6-element/4-group optical design by Caldwell Photographic in the USA.

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.