Blackmagic Design Blackmagic URSA Mini Pro B4 Mount (NOT compatible with URSA Mini Pro 12K)

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.

• Nikon F-mount lens to Sony E-mount cameras ;
• Compatible with both Nikkor F lens build-in with a manual aperture ring (including AF-D, AF, AI-S, AI & non-AI lens).
• Aluminum Alloy and Brass Construction with Chromium Plating ;
• Felt material flocked Interior to reduce internal reflection ;
• Satin Surface Finish ;
• Detachable Arca-Type tripod foot compatible with Arca Swiss, Markins, and Photo Clam ball heads(clamp directly or attach to quick release plate by a 1/4″-20 screw).

• Arri PL Lens to Canon RF Mount (EOS R) camera ;
• Aluminum Alloy and Brass Construction with Chromium Plating ;
• Felt material flocked Interior to reduce internal reflection ;
• Satin Surface Finish ;
• Detachable Arca-Type Tripod Foot, and compatible with Metabones Mount-Rod Support Kit (also compatible with Arca Swiss, Markins, and Photo Clam ball heads).