Overhaul your Blackmagic Design Pocket Cinema Camera 4K's (BMPCC4K) capabilities with the T Cine Speed Booster Xl 0.64x Adapter, a precision-crafted tool designed exclusively for Canon Ef lenses to fit the unique M43 mount of the Bmpcc4K. Unlike standard Micro Four Thirds adapters, this Speed Booster features an advanced optical design tailored to the 2.4mm filter stack thickness of Blackmagic cameras, ensuring superior image quality and compatibility.The Cine version of this Speed Booster stands out with its robust cine-style positive locking mechanism, which eliminates any play during focusing movements. This feature is crucial for filmmakers who demand smooth and precise focus control when using Ef lenses for cinematic purposes.Experience the benefits of a wider lens and increased maximum aperture with the T Cine Speed Booster Xl 0.64x. It not only reduces the BMPCC 4K's crop factor from 2.02x to an impressive 1.29x but also enables a maximum output aperture of f/0.