Metabones Adapter – EF / RF Speed Booster ULTRA 0.71x
From: $25.00 ex. GST
Makes lenses 0.71x wider
Increase maximum aperture by 1 stop
Autofocus. AF speed is properly adjusted to account for and leverage the shorter focal length and the brighter maximum aperture
With this Metabones EF to RF adapter you can now mount full-frame lenses to the new Canon RF mount. ( Cameras include C70, RED Komodo, Canon R) People who hire this adapter are now able to mitigate most of the 4k video crop factor of EOS R (1.75x) and EOS RP (1.63x) and reduce it to 1.24x and 1.15x respectively. The field of view is now much closer to still photo mode. A super 35mm Sensor becomes full frame so those gorgeous wide lenses you have are now unleashing the full potential.
This adapter will also allow you to increase maximum aperture by 1 stop. (with a maximum output aperture of f/0.9)