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Metabones T Speed Booster Ultra 0.71x Adapter for Canon Full-Frame EF-Mount Lens to Canon RF-Mount Camera

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Metabones T Speed Booster Ultra 0.71x Adapter for Canon Full-Frame EF-Mount Lens to Canon RF-Mount Camera
Key Features
  • Canon EF Lens to Canon RF Body
  • Full-Frame Lens to RF Camera Body
  • For UHD 4K Video Capture
  • 0.71x UHD 4K Crop Factor Compensation
This T Speed Booster Ultra 0.71x Adapter from Metabones allows a full-frame Canon EF-mount lens to be used on a Canon RF-mount camera. While providing a one-stop increase for the camera over the lens's aperture range, up to a maximum output aperture of f/0.9, the adapter's optics help to maximize the connected lens's apparent angle of view during UHD 4K video capture.
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If I put this on an EOS R with the EF 8-15mm ...

If I put this on an EOS R with the EF 8-15mm fisheye lens, will it get rid of the top and bottom crop seen in all video modes at the 8mm full-circle fisheye view, also using current firmware on camera and speedbooster if it has it?
Asked by: Steven
I just tested this for you. So with the original Canon adapter, because of the crop you don't get the full 8mm circle [ in 4K. 1080P you do get the full circle no crop ]. Now with this speed booster, even in 4K you get the full circle at 8mm. So you will get the black edges and the spherical look in the middle.
Answered by: Stephen
Date published: 2020-07-06

Has anybody tried this with a Canon C70? I have ...

Has anybody tried this with a Canon C70? I have and it seems to be unreliable, almost like it has a bad connection. I don't have another RF camera to test it on other than the C70.
Asked by: Keith
With the firmware V1.40 updated. The Speed Booster is compatible with the Canon C70, EOS R5/R6(in crop mode), and the user can assign the control ring functions to the wheel dial of adapter to adjust the aperture/ISO/WB, etc.
Answered by: Support
Date published: 2021-09-11

For use with an R5, any advantage of this vs. ...

For use with an R5, any advantage of this vs. Canon's $100 Mount Adapter EF-EOS R?
Asked by: Chris
You must read the overview. the Metabones adapter is an optical system that modifies your lens. The Speed Booster Ultra 0.71x Adapter from Metabones allows a full-frame Canon EF-mount lens to be used on a Canon RF-mount camera. While providing a one-stop increase over the lens's aperture range, up to a maximum output aperture of f/0.9, the adapter's optics help to maximize the connected lens's apparent angle of view during UHD 4K video capture. It will also change your lenses angle of view. You are comparing totaly different product designed for totaly diferent outcomes.
Answered by: Gary
Date published: 2020-07-20

So if I put this on the Sigma 24mm f1.4 Prime ...

So if I put this on the Sigma 24mm f1.4 Prime Lens, what would it make the aperture on it? Also does it work with that lens?
Asked by: Tee
This is compatible with the Sigma 24mm f/1.4 DG HSM Art Lens for Canon, and it'll be roughly equivalent to a f/0.9.
Answered by: Kevin
Date published: 2020-07-02

will the assignable wheel be recognized by ...

will the assignable wheel be recognized by komodo? Can you assign it to adjust iris?
Asked by: darin
According to the manufacturer, the RED Komodo camera (firmware V1.5.3) is not compatible with the Control Wheel function of the Metabones T Speed Booster Ultra 0.71x Adapter for Canon Full-Frame EF-Mount Lens to Canon RF-Mount Camera.
Answered by: Manzell
Date published: 2022-02-14

Will this adapter work for conversion to a super ...

Will this adapter work for conversion to a super 35mm sensor? Particularly to pair with a RED Komodo 6K.
Asked by: Geoff
I have both and it does work on the Komodo, but does not communicate autofocus information.
Answered by: Gery
Date published: 2021-02-21

Would it vignette on the Canon EOS R5/6?

Would it vignette on the Canon EOS R5/6?
Asked by: Andy
won't support Canon R5/R6 with current firmware, so there is no vignette, it's all black screen
Answered by: Nick
Date published: 2022-12-08

Will this also increase the aperture for stills ...

Will this also increase the aperture for stills on any particular lens used?
Asked by: jorge
Its been a while since I returned mine. I was pumped on it at first. But it came with so many limitations. I remember it not being even useful for photos. Do plenty of research before buying.
Answered by: Chris
Date published: 2020-07-18
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