Metabones Canon EF Lens to RF-Mount T CINE Speed Booster Ultra 0.71x Adapter (EOS-R)

Metabones Canon EF Lens to RF-Mount T CINE Speed Booster Ultra 0.71x Adapter (EOS-R)

Use this Metabones Canon EF Lens to RF mount T CINE Speed Booster Ultra 0.71x (EOS-R) to adapt Canon EF mount full frame lenses to the new Canon RF mount. Filmmakers can now reduce most of the 4k video crop factor of the EOS-R (1.75x) and EOS-RP (1.63x) and reduce it to 1.24x and 1.15x respectively to support the recently new EOS C70 (Super 35mm sensor). The field of view is now much closer to the still image mode. Speed Booster is not intended for still photography but works if the camera is configured to APS-C mode. It uses an advanced 5-element/4-group optical design by Caldwell Photographic, incorporating ultra-high index, tantalum-based optical glass to achieve outstanding optical performance with improved corner sharpness, distortion and reduced vignetting. The Speed Booster Ultra has a magnification of 0.71x, effectively reducing the crop factor for 4k video on the EOS-R and EOS-RP from 1.75x to 1.24x. It features a design that makes highly efficient use of exotic materials at the extreme limit of glass manufacturing technology, and as a result, it is well-corrected for use with virtually all full-frame SLR lenses regardless of exit pupil distance. The Speed Booster Ultra performs extremely well with professional f/2.8 zoom lenses such as the 24-70mm f/2.8 and 70-200mm f/2.8 zooms from Canon to produce the 17-50mm f/2.0 and 50-142mm f/2.0 high-speed zoom, respectively. Similarly, high-speed fixed focal length lenses such as the 50mm f/1.2 will transform into a 35.5mm f/0.9 lens with excellent contrast and resolution from the center all the way to the edges of the image.

Mechanical

Patented EF lens with positive lock
Tripod base is removable and compatible with Arca-Swiss, Markins and Photo Clam ball heads.
Flocking to reduce internal reflection
Satin surface finish
Aluminum alloy and brass construction with chrome plating
Rubber gasket protects the RF mount connector from dust and moisture

Electronic

Autofocus speed is properly adjusted to account for and utilize the shorter focal length and brighter maximum aperture.
Dual-pixel autofocus (DPAF) and video AF support
It is powered by the camera body as with most lenses, no external power source required
LED indicator shows communication status
Built-in multifunction control wheel (swing/push-in) for assignable functions (e.g. ISO, shutter speed or aperture control, depth of field preview)
Store EXIF data (lens name, focal length and maximum/ minimum aperture) of a manual lens in the adapter.
Support for image stabilization (IS).
Focal length and aperture are adjusted in EXIF.

Optical

Increase maximum aperture by 1 stop with a maximum aperture of f/0.9
Advanced 5-element/4-group optical design incorporating ultra-high index tantalum-based optical glass from Caldwell Photographic.
Increase MTF and make the lens 0.71x wider

Compatibility list

Canon RF camera (in APS-C crop mode)
EOS-R, EOS-R-P, EOS-R5, EOS-R6, EOS-C70
RED Komodo camera
Canon EF lens
Canon EF extender (teleconverter)
Carl Zeiss EF mount lens
Sigma EF mount lens
Tamron EF mount lens
Tokina EF mount lens
Contax N-mount lenses modified for Canon EF by Conurus
Contax 645 NAM-1 adapter modified to Canon EF by Conurus