Unlock the full potential of your Canon RF-mount camera with the Metabones T Speed Booster Ultra 0.71x Adapter. This innovative adapter allows you to use a full-frame Canon EF-mount lens on your Canon RF-mount camera. It not only provides a one-stop increase in the camera's aperture range, up to an astounding f/0.9, but it also maximizes the lens's apparent angle of view during UHD 4K video recording.

When shooting UHD 4K video, Canon RF-mount cameras exhibit an in-camera 'crop factor,' capturing only the center portion of the projected image on the sensor. For instance, the Canon EOS R Mirrorless Digital Camera Body and Canon EOS RP Mirrorless Digital Camera Body feature crop factors of 1.75x and 1.63x, respectively. The Metabones adapter counteracts this by condensing the full-frame lens's light through five optical elements in four groups, effectively reducing the crop factor to 1.24x and 1.15x, respectively. This process also provides an additional one-stop boost to the available light throughout the lens's aperture range.

Constructed from durable aluminum alloy to minimize weight, the adapter features brass mounting rings for added robustness. Its matte black interior coating prevents reflections within the adapter barrel, and the detachable Arca-type compatible tripod foot with 1/4"-20 threads helps relieve stress on the camera mount when used on a tripod.

The Metabones T Speed Booster Ultra 0.71x Adapter supports electronic communication between your camera and lens, enabling you to use features like autofocus, image stabilization, and camera-controlled aperture functions. Furthermore, it transfers EXIF metadata if your lens can generate it when paired with a directly compatible camera, ensuring that this information is preserved in the image files produced by the Canon EF-mount lens and Canon EF-M mount camera combination.

• Allows a full-frame Canon EF-mount lens to be used on a Canon RF-mount camera
• Supports electronic communication between camera and lens to enable autofocus, image stabilization, on-camera aperture control, and EXIF metadata generation when possible
• 0.71x magnification maximizes angle of view of combined camera and lens for UHD 4K video capture
• Provides a 1-stop increase for the camera over the lens's aperture range, up to a maximum output aperture of f/0.9
• Reduces Canon EOS R Mirrorless Digital Camera Body UHD 4K video capture crop factor from 1.75x to 1.24x
• Reduces Canon EOS R Mirrorless Digital Camera Body UHD 4K video capture crop factor from 1.63x to 1.15x
• Allows still image capture with a compatible camera set to APS-C mode
• Integrated jog dial with press-to-click action can be assigned custom functions when used with a compatible camera
• Five lens elements in four groups for optical clarity as well as color fidelity
• Internal, black matte coating minimizes the appearance of reflections within the adapter barrel
• Aluminum alloy components for weight reduction
• Brass mounting rings prevent wear-and-tear
• Detachable Arca-type tripod foot with 1/4"-20 threads can be used to reduces stress on a connected camera's mount
• Locking mechanism for secure attachment of lens with push-button release