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The Canon EF to Canon EFR mount T Speed Booster ULTRA 0.71x (EOS R) 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.
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. The field of view is now much closer to still photo mode. This also makes available to the sensor an additional one stop of light throughout the lens's aperture range.
This adapter is constructed from aluminium alloy for durability while minimizing weight and its mounting rings are made with brass to further prevent wear-and-tear. An internal, matte black coating prevents the appearance of reflections within the adapter barrel, and to help reduce stress on the camera mount when placed on a tripod, the adapter includes a detachable Arca-type compatible tripod foot with 1/4"-20 threads.
This T Speed Booster Ultra 0.71x Adapter supports electronic communication between an attached camera and lens. If the lens includes autofocus, image stabilization, as well as camera-controlled aperture functions, this adapter is intended to allow use of those features. Also, if an attached lens is capable of generating EXIF metadata when used with a directly compatible camera, this adapter is designed to transfer that information, so it can be saved along with image files generated the combined Canon EF-mount lens and Canon EF-R mount camera.
Note: This Speed Booster is not intended for still photography but will work if the camera is configured to APS-C mode. 60p FHD video does not work at all.
The Canon EF to Canon EFR mount T Speed Booster ULTRA 0.71x (EOS R) is compatible with the EOS R and EOS RP cameras plus select lenses. For a list of compatible products* please see our specification tab.
* as of July 2020
At digiDirect, we pride ourselves on our product knowledge, and the lengths we’ll go to find our customers the gear that is right for them. Our staff are on-hand and ready to help you in any way they can! All you need do is reach out and contact us via our contact form, by giving us a call, or by visiting your local digiDirect store.
The Canon EF to Canon EFR mount T Speed Booster ULTRA 0.71x (EOS R) 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.
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. The field of view is now much closer to still photo mode. This also makes available to the sensor an additional one stop of light throughout the lens's aperture range.
This adapter is constructed from aluminium alloy for durability while minimizing weight and its mounting rings are made with brass to further prevent wear-and-tear. An internal, matte black coating prevents the appearance of reflections within the adapter barrel, and to help reduce stress on the camera mount when placed on a tripod, the adapter includes a detachable Arca-type compatible tripod foot with 1/4"-20 threads.
This T Speed Booster Ultra 0.71x Adapter supports electronic communication between an attached camera and lens. If the lens includes autofocus, image stabilization, as well as camera-controlled aperture functions, this adapter is intended to allow use of those features. Also, if an attached lens is capable of generating EXIF metadata when used with a directly compatible camera, this adapter is designed to transfer that information, so it can be saved along with image files generated the combined Canon EF-mount lens and Canon EF-R mount camera.
Note: This Speed Booster is not intended for still photography but will work if the camera is configured to APS-C mode. 60p FHD video does not work at all.
The Canon EF to Canon EFR mount T Speed Booster ULTRA 0.71x (EOS R) is compatible with the EOS R and EOS RP cameras plus select lenses. For a list of compatible products* please see our specification tab.
* as of July 2020
At digiDirect, we pride ourselves on our product knowledge, and the lengths we’ll go to find our customers the gear that is right for them. Our staff are on-hand and ready to help you in any way they can! All you need do is reach out and contact us via our contact form, by giving us a call, or by visiting your local digiDirect store.
Camera Mount | Canon RF |
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Lens Mount | Canon EF |
Magnification | 0.71x |
Optical Design | 5 Elements in 4 Groups |
Tripod Mounting Thread | 1/4"-20 Female |
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Dimensions | ø: 2.8 x H: 0.8" / ø: 70.0 x H: 20.0 mm |
Weight | 7.87 oz / 223 g |
Compatibility list | Canon RF series camera: EOS R and EOS RP
Canon EF-mount Lens Canon EF-Extender (Teleconverter) Carl Zeiss EF-mount Lens (see note 2) Sigma EF-mount Lens (see note 2) Tamron EF-mount Lens (see note 2) Tokina EF-mount Lens (see note 2) Contax N mount lenses modified to Canon EF by Conurus Contax 645 NAM-1 adapter modified to Canon EF by Conurus |
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NOTES |
1. EF-S lenses do not fit on Speed Booster®. Some EF-S lenses may be modified to fit, but do so at your own risk.
2. EF-S lenses and third-party lenses designed for APS-C format DO NOT WORK AT ALL when used in conjunction with Speed Booster® due to the limitation of image coverage. 3. For use with fast lenses (faster than f/1.4), the pre-boost apertures will be displayed in the camera.
5. Many manual focus lenses (e.g. OM 28/2.8, OM 50/1.8, Leica R 15/3.5) have rear protrusions (spikes, levers, other appendages) which would damage the optics and/or housing of Speed Booster® They need to be modified before they can be safely used on Speed Booster® Check and make sure there are no rear protrusions from the adapter/lens combination before using on Speed Booster®. Scratches and damages caused by rear protrusions on Speed Booster® are not covered by warranty. |
WARNING | To update the firmware of a Canon EF lens downloaded from Canon's web site, use Canon's own adapter. While a Metabones Speed Booster has been tested for this use case scenario it is not guaranteed to work and not supported. |
The Metabones Canon EF to Canon EFR mount T Speed Booster ULTRA 0.71x (EOS R) is an adapter that allows Canon EF lenses to be mounted on Canon EFR mirrorless cameras. It also increases the effective aperture and reduces the focal length of the lens.
The T Speed Booster ULTRA is designed to improve the performance of Canon EF lenses when used on Canon EFR mirrorless cameras. It enhances image quality by increasing sharpness, reducing vignetting, and improving overall image quality.
The T Speed Booster ULTRA not only allows Canon EF lenses to be mounted on Canon EFR cameras, but it also enhances the lens performance by increasing the effective aperture and reducing the focal length. Regular adapters simply allow for the physical connection of different lenses and cameras.
The T Speed Booster ULTRA has a magnification factor of 0.71x, which means it reduces the focal length by 0.71x and increases the effective aperture by 1 stop.
No, the T Speed Booster ULTRA is not compatible with all Canon EF lenses. It is recommended to check the compatibility list on the Metabones website before purchasing.
Yes, the T Speed Booster ULTRA supports autofocus with most Canon EF lenses. However, some older lenses may not have full autofocus functionality.
Yes, the T Speed Booster ULTRA supports electronic aperture control with most Canon EF lenses. However, some older lenses may not have electronic aperture control.
Yes, the T Speed Booster ULTRA is compatible with both full-frame and crop sensor Canon EFR cameras.
The T Speed Booster ULTRA is constructed with high-quality materials and has a solid, durable build. It also has a matte black finish to minimize reflections.
Yes, the T Speed Booster ULTRA is easy to use. Simply attach the adapter to your Canon EFR camera and then mount the Canon EF lens onto the adapter.