Just when you thought your photography couldn't get any better, the T Cine Speed Booster Ultra 0.71x Adapter for Canon Ef Lens to Bmpcc4K Camera steps in to elevate your game. This specialized adapter is similar to the standard M43 Speed Booster, but its optics have been meticulously re-engineered to optimize for the unique 2.4mm filter stack thickness found in Blackmagic cameras, as opposed to the 4mm in a standard Micro Four Thirds.The Cine version of this adapter is equipped with a robust cine-style positive locking mechanism, ensuring zero play during focusing. This feature is crucial when using Ef lenses for cine work, as it guarantees smooth and precise focus movement. Designed exclusively for the Blackmagic Design Pocket Cinema Camera 4K (BMPCC4K), the BMPCC4K Speed Booster Ultra 0.71x Adapter cannot be attached to other M43 cameras such as Jvc, Olympus, or Panasonic. This adapter reduces the crop factor of the BMPCC 4K camera from 2.02x to 1.