Metabones Canon EF Lens to RF-mount T CINE Speed Booster ULTRA 0.71x MB_SPEF-EFR-BT2

Optical

•     Increase maximum aperture by 1 stop. (with a maximum output aperture of f/0.9).
•     Increase MTF (details).
•     Makes lens 0.71x wider.
•     Advanced 5-element/4-group optical design incorporating ultra-high index tantalum-based optical glass by Caldwell Photographic in the USA (patent granted).

Electronic

•     Autofocus.  AF speed is properly adjusted to account for and leverage the shorter focal length and the brighter maximum aperture.
•     Dual-pixel autofocus (DPAF) and video AF support.
•     Focal length and aperture are adjusted in EXIF (see note 3).
•     Image stabilization (IS) lens support.
•     Store EXIF data (lens name, focal length and maximum/minimum aperture) for one manual lens in the adapter.
•     Build-in multi-function Control Wheel (turn/ push-in) for assignable functions(eg. ISO, shutter speed or aperture control, depth-of-field preview).
•     Cinema EOS lens (CN-E 18-80mm T4.4 L) support with the supported camera (eg. EOS C70).
•     LED indicator shows communication status. 
•     Powered by camera body. With most lenses, no external power source is required.
•     Cinema camera Canon EOS C70 and RED KOMODO 6K support.

Mechanical

•     Patented positive-lock EF lens mount.
•     The tripod foot is detachable and compatible with Arca Swiss, Markins and Photo Clam ball heads.
•     Flocking to reduce internal reflection.
•     Rubber gasket protects the RF mount connection from dust and moisture.
•     Aluminum alloy and brass construction with chromium plating.
•     Satin surface finish.