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Design for attaching full-frame PL Prime Lens to Canon RF-mount cameras/camcorders
Increase maximum aperture by 1 stop
Increase MTF
Makes lens 0.71x wider
The advanced 5-element/4-group optical design incorporating ultra-high index tantalum-based optical glass by Caldwell Photographic in the USA (patent granted)
Positive-lock PL lens mount
Felt material flocked inside the opening to reduce internal reflection
Satin Surface Finish
Aluminum Alloy and Brass Construction with Chromium Plating
Detachable Arca-Type tripod foot compatible with Arca Swiss, Markins, and Photo Clam ball heads(clamp directly or attach to quick-release plate by a 1/4"-20 screw)
This product is designed for the APS-C format camera (eg. Canon EOS C70 and RED Komodo, etc.) or using with the APS-Crop mode of EOS R3, EOS R5, EOS R6, EOS R and EOS RP
Metabones MB_SPPL-EFR-BT1 (MB-SPPL-EFR-BT1, MB/SPPL-EFR-BT1, MB/SPPL/EFR/BT1, MBSPPLEFRBT1) ARRI PL Lens to RF-Mount T CINE Speed Booster ULTRA 0.71x
Always Enhance and Never Degrade the Performance of the Attached Master Lens.
Sharper corners, less distortion, reduced vignetting
New optical design: advanced 5-element/4-group optical design incorporating ultra-high index tantalum-based optical glass to achieve extraordinary optical performance with improved corner sharpness, distortion and reduced vignetting.
Like the revolutionary original Metabones Speed Booster announced in January 2013, the Speed Booster ULTRA has a magnification of 0.71x, and so it effectively reduces the crop factor of mirrorless cameras with DX-sized sensors and Super35 camcorder, such as Sony E-mount, Fuji X-mount cameras Sony FS7 MARKII, from 1.5x to 1.07x. However, the new ULTRA design 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/Prime lenses regardless of exit pupil distance.
Magnification: 0.71x
Crop Factor with DX format Camera: 1.07x
Maximum Output Aperture: f/0.90 (with f/1.2 Lens Attached)
Rectilinear Distortion: < 1%
Lens Elements/Groups: 5/4
Length Reduction: 4.2mm
Camera Mount: Canon RF
Image Format: DX, APS-C
Lens Mounts: ARRI PL
Tripod Mount: Robust Removable Type with Arca Swiss Compatibility
In The Box
Metabones ARRI PL Lens to RF-Mount T CINE Speed Booster ULTRA 0.71x
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