The 0.71x Locking Speedbooster Adapter for EF Lens to Canon RF Mount Cameras from Meike enables you to use a wide array of full-frame EF mount lenses on your Canon RF mount camera. This adapter features a locking bayonet mount and maintains essential lens functions like autofocus, aperture control, and image stabilization. Note that this adapter increases your lens's effective field of view by slightly reducing its focal length while increasing the aperture by one stop.
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Key Features
- Full-Frame EF Lens to Canon RF Mount
- 0.71x Focal Length Reduction
- Locking Bayonet Adapter
- 1-Stop Increase in Lens Aperture
The 0.71x Locking Speedbooster Adapter for EF Lens to Canon RF Mount Cameras from Meike enables you to use a wide array of full-frame EF mount lenses on your Canon RF mount camera. This adapter features a locking bayonet mount and maintains essential lens functions like autofocus, aperture control, and image stabilization. Note that this adapter increases your lens's effective field of view by slightly reducing its focal length while increasing the aperture by one stop.
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Meike MK-EFTR-071XL Overview
Meike MK-EFTR-071XL Specs
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Meike MK-EFTR-071XL Reviews
Works awesome
By Nicholas
Rated 5 out of 5
Date: 2025-05-07
Works flawlessly with my Blazar Remus 45mm anamorphic and canon EF glass. Lenses focus to infinity and didn’t need to do any additional shimming.
See any errors on this page?
Hi, can i use this on a C70? thanks
Hi, can i use this on a C70? thanks
Yes, the Meike 0.71x Speedbooster Adapter will be compatible with a Canon C70.
Date published: 2024-10-30
Does this work for all "Full Frame" EF to "APS-C" ...
Does this work for all "Full Frame" EF to "APS-C" RF cameras? Can it replace the Venus/Laowa 0.7x Focal Reducer for Probe Lens?
Yes, the Meike MK‐EFTR‐071XL 0.71x Locking Speedbooster Adapter works with full-frame EF lenses on APS-C RF-mount cameras. However, it cannot fully replace the Venus/Laowa 0.7x Focal Reducer for the Probe Lens, as those adapters are specifically optimized for extreme macro/probe lenses and may have different optical correction.
Date published: 2025-11-23
Does it work on photo mode well?
Does it work on photo mode well?
Yes, the Meike 0.71x Locking Speedbooster Adapter for EF Lens to Canon RF Mount Cameras can be used to adapt lenses for taking photos.
Date published: 2024-08-05
2. And if it works on photo mode, any problem ...
2. And if it works on photo mode, any problem with that such as autofocus etc?
The Meike 0.71x Locking Speedbooster Adapter for EF Lens to Canon RF Mount Cameras supports autofocus and all camera-to-lens communication in photo mode.
Date published: 2024-08-05
Will this fit on a red v-raptor (native RF ...
Will this fit on a red v-raptor (native RF mount)?
Yes, the Meike 0.71x Locking Speedbooster Adapter for EF Lens to Canon RF Mount Cameras works with the RED DIGITAL CINEMA V-RAPTOR 8K S35 Camera (Canon RF).
Date published: 2025-08-31
Does this adapter include brackets to lock the ...
Does this adapter include brackets to lock the mount in place on the Canon C70?
The Meike 0.71x Locking Speedbooster Adapter for EF Lens to Canon RF Mount Cameras is not recommended for the Canon C70. It is best to use the Canon Mount Adapter EF-EOS R 0.71x, BH #CAMAEFRF71X (https://bhpho.to/47D7cL5).
Date published: 2026-03-17
Will this work with the Canon R50V?
Will this work with the Canon R50V?
Yes, the Meike 0.71x Locking Speedbooster Adapter for EF Lens to Canon RF Mount Cameras is compatible with the Canon EOS R50 V Mirrorless Camera.
Date published: 2026-05-19