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

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

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 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 to support the newly EOS C70 (Super 35mm sensor). The field of view is now much closer to still photo mode. The Speed Booster is not intended for still photography but will work 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 extraordinary 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 of 4k video on EOS-R and EOS-RP from 1.75x to 1.24x. It has a design that makes very effective use of exotic materials at the furthest limit of glassmaking technology, and as a result 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-grade f/2.8 zoom lenses such as the 24-70mm f/2.8 and 70-200mm f/2.8 zooms by Canon to produce 17-50mm f/2.0 and 50-142mm f/2.0 high-speed zooms, respectively. Similarly, high-speed fixed focal length lenses including a 50mm f/1.2 will be transformed 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 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

Satin surface finish

Aluminum alloy and brass construction with chromium plating

Rubber gasket protects the RF mount connection from dust and moisture

Electronic

Autofocus 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

It is powered by the camera body as with most lenses, no external power source required

LED indicator shows communication status

Build-in multi-function control wheel (turn/ push-in) for assignable functions (eg. ISO, shutter speed or aperture control, depth-of-field preview)

Store EXIF data (lens name, focal length, and maximum/minimum aperture) for one manual lens in the adapter

Image stabilization (IS) lens support

Focal length and aperture are adjusted in EXIF

Optical

Increase maximum aperture by 1 stop with a maximum output aperture of f/0.9

Advanced 5-element/4-group optical design incorporating ultra-high index tantalum-based optical glass by Caldwell Photographic

Increase MTF and makes lens 0.71x wider

Compatibility

Canon RF camera (under APS-C crop mode)

EOS-R, EOS-RP, EOS-R5, EOS-R6, EOS-C70

RED Komodo camera

Canon EF-mount 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 to Canon EF by Conurus

Contax 645 NAM-1 adapter modified to Canon EF by Conurus

Camera Mount

Canon EF

Lens Mount

Canon RF

Magnification

0.71x

Electronic Communication

Yes

Optical Design

5 Elements in 4 Groups

Display

No

Material

Aluminum, Brass

In the Box

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