Kaiser Fototechnik 6516 Filter adapter ring, black 52mm-55mm

• 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).

• • • • 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.