The Metabones Canon EF to Micro 4/3 Speed Booster T Ultra allows you to mount any full-frame Canon EF-mount lens to Micro 4/3 cameras. Key features include:
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Canon EF lens to Micro 4/3 body
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Wider focal length and increased aperture
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Electronic communication with the camera
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Sturdy design with built-in tripod foot
What’s Different. What sets the Speed Booster T Ultra apart from the XL is its 0.71x focal-length increase, its 1-stop maximum-aperture increase, and its autofocus support on select lenses.
Lens Compatibility. The adapter allows full-frame Canon EF and third-party EF-mount lenses to be used on compatible Micro 4/3 cameras.
Camera Compatibility This adapter offers limited autofocus, image stabilization, and aperture control with select Micro 4/3 cameras and Canon EF mount lenses. For more information, you can check the manufacturer’s list .
Wider Focal Length and Increased Aperture. This version of the Speed Booster widens the mounted lens’s focal length by 0.71x, reducing the overall sensor-crop factor 2x to 1.42×. It also increases the mounted lens’s maximum aperture by 1 stop.
Electronic Communication. The adapter’s mount has electric contacts that allow you to use compatible lenses’ autofocus, aperture-control, and image-stabilization functions. For use with most lenses, the adapter doesn’t require a separate power source, and EXIF data is transferred and embedded into your footage.
Sturdy Design with Built-In Tripod Foot. The aluminum-alloy barrel and brass mounts give it a solid feel, with an Arca-Swiss compatible tripod foot that lets you mount the adapter itself directly to a tripod. This ensures the lens’s weight doesn’t put additional stress on the camera’s mount.
| Brand |
Metabones |
| Compatibility |
Canon EF-mount lens to Micro 4/3-mount camera |
| Crop Factor |
0.71x |
| Dimensions |
.9″ × 2.6″ |
| Groups/Elements |
4/5 |
| Item Type |
Lens |
| Lens Type |
Adapter |
| Mount |
Micro 4/3rds |
| Weight |
0.4 lb. |


















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