The Metabones Canon EF to Canon RF Speed Booster T Ultra allows you to mount any full-frame Canon EF-mount lens to Canon RF-mount cameras with a crop-factor when shooting in 4K. Key features include:
Canon EF lens to Canon RF body
Wider focal length and increased aperture
Electronic communication with the camera
Not compatible with the Canon C70, R5, or R6
No. If you want to adapt EF-mount lenses to the Canon EOS C70 Cinema Camera – RF, we recommend the Canon EF-EOS R 0.71x Mount Adapter instead.
We can’t recommend this product for professional work. We reached this decision after Lensrentals folks and rental clients experienced repeated failures in the field. Though it might work much of the time, it’s our opinion that this product’s performance is too unpredictable to be trusted on high-value projects. Use for casual testing or try-before-you-buy purposes only. If you have any questions, please contact us.
This adapter doesn’t allow slam infinity focus. Every lens will be slightly different, and they’re designed to be this way. If you do any infinity-focus adjustment to this adapter, we’ll charge you.
This adapter isn’t compatible with Canon EF-S mount lenses.
Autofocus | Unknown |
Brand | Metabones |
Compatibility | Full Frame |
Diameter | 2.8" |
Focal Length | Unknown |
Groups/Elements | 4/5 |
Hood Included | No |
Image Stabilization | Unknown |
Autofocus | Unknown |
Brand | Metabones |
Compatibility | Full Frame |
Diameter | 2.8" |
Focal Length | Unknown |
Groups/Elements | 4/5 |
Hood Included | No |
Image Stabilization | Unknown |