The Canon EF to FUJIFILM X-Mount Speed Booster ULTRA 0.71xfrom Canon EF to FUJIFILM X-Mount Speed Booster ULTRA 0.71xallows a Canon EF-mount lens to be mounted onto a camera with a FUJIFILM X-mount. The adapter's optics maximize the connected lens's apparent angle of view by a factor of 0.71x while providing a one-stop increase for the camera over the lens's aperture range.

This adapter supports electronic communication between the lens and camera body, so AF, image stabilization, aperture control, and Exif data transfer are supported. If a lens designed for 35mm film or similarly sized full-frame camera sensor is connected to a camera with a smaller sensor, it would project an image larger than the sensor was made to render. Able to capture only the center portion of the projected image, the effective angle of view of the lens would be narrowed, creating an in-camera "crop factor." The T CINE Speed Booster ULTRA 0.71x adapter condenses the light from a lens designed for 35mm film or "full-frame" camera sensors and projects it onto the sensor. This allows the camera's sensor to utilize more of the light gathered by a connected lens, which effectively reduces the crop factor while making available to the sensor an additional one f/stop of light for each of the lens's f/stop settings.

This adapter is constructed from aluminum for durability while minimizing weight, and its mounting rings are made with brass to further prevent wear and tear. The internal optics feature five lens elements in four groups and are designed to provide optical clarity as well as color fidelity. The detachable tripod foot is Arca-type compatible and features 1/4"-20 threads.

NOTE: This adapter does not support EF-S-mount lenses.

Canon EF to FUJIFILM X-Mount Cameras    Electronic Communication Supported    Ultra-High Index Tantalum-Based Glass    Increases Maximum Aperture by 1 f/Stop    Increases Angle of View by 0.71x    Infinity Focus Adjustment    Detachable Tripod Foot    Black Matte Interior; Black Exterior

• Allows a Canon EF-mount lens to be used with a FUJIFILM X-mount camera body
• Maximizes apparent angle of view of combined camera and lens
• Provides a 1-stop increase for the camera over the lens's aperture range
• Supports electronic communication
• Five lens elements in four groups for optical clarity and color fidelity
• Detachable, Arca-type compatible tripod foot with 1/4"-20 threads
• Aluminum components for weight reduction
• Brass mounting rings prevent wear and tear

• Canon EF 40mm f/2.8 STM
• Canon EF 50mm f/1.2L USM
• Canon EF 50mm f/1.4 USM
• Canon EF 50mm f/1.8 II
• Canon EF 50mm f/1.8 STM
• Canon EF 85mm f/1.2L II USM
• Canon EF 100mm f/2.8 USM Macro
• Canon EF 100mm f/2.8L IS USM Macro
• Canon EF 135mm f/2 L USM
• Canon EF 200mm f/2.8L II USM
• Canon EF 300mm f/2.8L IS II USM
• Canon EF 300mm f/4L IS USM
• Canon EF 400mm f/5.6l
• Canon EF 8-15mm f/4L Fisheye
• Canon EF 16-35mm f/2.8L II USM
• Canon EF 17-35mm f/2.8L USM
• Canon EF 24-70mm f/2.8L II USM
• Canon EF 24-70mm f/2.8L USM Mk1
• Canon EF 24-105mm f/4L IS USM
• Canon EF 28-70mm f/3.5-4.5 II
• Canon EF 28-135mm f/3.5-5.6 IS USM
• Canon EF 28-80mm f/3.5-5.6 III USM
• Canon EF 70-200mm f/2.8L IS II USM
• Canon EF 70-200mm f/4L IS II USM
• Canon EF 70-200mm f/4L USM
• Canon EF 70-300mm f/4-5.6 L IS USM
• Canon EF 100-400mm f/4.5-5.6 L IS II USM
• Canon EF TS-E 17mm f/4L
• Canon EF TS-E 24mm f/3.5L II
• Canon EF-Extender (Teleconverter)
• Sigma 24mm f/2.8 Super Wide II
• Sigma 35mm f/1.4 DG Art 012
• Sigma 50mm f/1.4 DG HSM non art
• Sigma 135mm f/1.8 DG HSM Art 017
• Sigma 24-35mm f/2 Art 015
• Sigma 24-105mm f/4 OS HSM Art 013
• Tamron 45mm f/1.8 VC (F013)
• Tamron 10-24mm f/3.5-4.5 VC HLD (B023)
• Tamron 15-30mm f/2.8 VC (A012)
• Tamron 17-50mm f/2.8 VC (B005)
• Tamron 18-250mm f/3.5-6.3 Di II (A18)
• Tamron 18-270mm f/3.5-6.3 Di II VC (B003)
• Tamron 18-270mm f/3.5-6.3 Di II VC PZD (B008)
• Tamron 24-70mm f/2.8 Di VC USD (A007)
• Tamron 28-300mm f/3.5-6.3 XR Di (A06)
• Tamron 35-150mm f/2.8-4 Di VC OSD (A043)
• Tamron 70-210mm f/4 Di VC USD (A034)
• Tamron 70-300mm f/4-5.6 Di VC USD (A005)
• Tokina 50mm f/1.4 Opera
• Zeiss ZE 18mm f/3.5mm Distagon

Related Questions and Answers

Q: 1. What's the difference between this model (MEMBSPEFXBT1) and the CINE model (MEMBSPEFXBT2)?

A: The Metabones Canon EF to FUJIFILM X-Mount T CINE Speed Booster ULTRA 0.71x Adapter differs from the Metabones Canon EF Lens to FUJIFILM X-Mount Camera Speed Booster ULTRA in that it offers a locking mechanism on for added stability.

Q: 2. Does autofocus work on this speed booster?

A: No, it would not. We have no lens adapters, neither standard or Speed Booster design, that are designed to retain autofocus communication between Nikon F-mount lenses and the Fujifilm X-mount. There are no electronic contacts on the Metabones lens adapter for electronic communication between the camera and the lens. Although the lens will fit physically, automatic diaphragm (AE metering), or other auto functions are not retained using this speed booster.

Q: 3. does this work with Nikon ais lens, such as 105mm f2.5, micro 55mm f2.8..etc..?

A: This adapter does a terrific job doing just about everything possible for being an adapter. It will take your Nikkor lenses and attach them to your Fujifilm X-Mount camera. It will squeeze the image so it better fits the Fujifilm camera's APS-C format. In doing so, it also makes the lens brighter or faster. This lets you shoot in lower light. Now, a couple of things it does not do. It cannot transmit electronic communication between the camera and lens. That means you must manually focus and manually set the aperture on the adapter to get your proper exposure. Other than that stipulation, which you may enjoy actually, you are good to go.

Q: 4. Does this adapter work for Canon FD lenses?

A: The Metabones Canon EF Lens to FUJIFILM X-Mount Camera Speed Booster ULTRA will not work with Canon FD lenses; it only works with EF lenses.

Q: 5. When it says that certain Leica R lenses need to be modified to be used on this, what does that mean?

A: There is a small metal lip that needs to be removed (with a metal saw/file) on the back of some Leica lenses (listed on the Metabones web site), otherwise it will hit the SpeedBooster's glass element. There is a risk of damaging the lens when removing this lip, so I asked a repair shop to do it for me. I don't think the lip has a mechanical function, but it prevents the back element of the lens to be scratched if you lay the lens on a table. So you will have to be extra careful how you handle the lens after you remove the lip.

Q: 6. Will the speed booster support Tamron F mount lenses such as the Tamron SP 85mm f/1.8 Di VC USD Lens and would it loose its VC or any other side effects apart from AF and AE? Would the focal length or minimum focus distance change?

A: VC will be disabled as the adapter has no electronic contacts. Apart from that, the lens' focal length will change due to crop factor and the speedbooster's optical element (85mm x 1.5 crop factor x 0.71 optical element) and its maximum aperture will increase by a stop (as far as light collection is concerned).

Q: 7. I bought this adapter to try using The Nikkor PC lens 24mm and the PC 19mm on my Fuji xt2. Although it mounts and shoots, I cant change the aperture even though the 24 has an aperture ring. It works flawlessly with a 50mm f1.8 prime though. The pc lenses are not on the metabones list of lenses that dont work. Any suggestions?

A: Make sure that the camera menu says shoot without lens. That is the main reason folks have problems with these lens adapters on Fuji cameras. Once you are up and running, both the aperture and the f/stop are manual. I do not know about the manual aperture not working on the 24mm, I cannot see why it would not. However, I would say that in any event, the aperture on the adapter would be the way to go.

Q: 8. Hi, does this speedboster allow IBIS to work with mechanical lenses? I use old vintage lenses adapted to EF. Also, does the Autofocus work with Canon and Sigma EF lenses?

A: If using this adapter with a Fuji X body like the X-T4, which has built in stabilization, you can still utilize that feature with adapted EF lenses.

Q: 9. What's different from the non-cine version?

A: The CINE version has Metabones' patented positive-lock that locks stiffer and prevents any wiggle which comes into play when using follow-focus devices.

Q: 10. Will this work with the 14-24 f2.8 WA zoom? Answers to this question seem to have some questions as to whether they are accurate.Thanks

A: It will work and you will keep the same focal length contrary to the inaccurate information that's on the web saying that it reduces your 14-24 to 10-17. Also you will be stuck at shooting f2.8 since it does not have an aperture ring. Finally, depth of field remains the same. F2.8 will still be f2.8 but you will get a stop of extra light. This speedbooster works best with lenses that have an aperture ring. The more you know.