Features:SmallRig Lens Mount Adapter Support for BMPCC 4K 2247 is designed to work with SmallRig BMPCC Cage 2203, 2254 and 2255. It mounts to the cage by two M4 screw, and lock the Lens adapter by one 1/4 screw. It supports the Lens adapter, relief pressure from heavy lenses and prevent loss of sig..