Explore the transformative capabilities of the T Speed Booster ULTRA 0.71x Adapter, specifically designed for Canon EF Lens to BMPCC4K Camera. This innovative adapter is not just a regular M43 Speed Booster; it's been meticulously re-engineered to optimize for the unique filter stack thickness of 2.4mm found in Blackmagic cameras, as opposed to the standard 4mm in Micro Four Thirds. Exclusively designed for the Blackmagic Design Pocket Cinema Camera 4K (BMPCC4K), this adapter is not compatible with other M43 cameras such as those from JVC, Olympus, or Panasonic. The T Speed Booster ULTRA 0.71x significantly reduces the crop factor of the BMPCC 4K camera from 2.02x to 1.43x, producing the largest aperture optics currently available, with a maximum output aperture of f/0.9.