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Metabones Canon EF Lens to Micro Four Thirds Camera T CINE Speed Booster XL 0.64x (Fifth Generation)

BH #MESPEFM43BT6 • MFR #MB_SPEF-M43-BT6
Metabones
Metabones Canon EF Lens to Micro Four Thirds Camera T CINE Speed Booster XL 0.64x (Fifth Generation)
Key Features
  • Canon EF Lens to MFT Camera
  • Positive-Lock Canon EF Lens Mount
  • Increases Maximum Aperture by 1-1/3 Stop
  • Increases Angle of View by 0.64x
Boost the performance of your full-frame Canon EF-mount lenses when mounted to your Micro Four Thirds camera with this fifth-generation T CINE Speed Booster XL 0.64x from Metabones. This cinema-styled electronic adapter features a positive-lock lens mount that will ensure that your adapted lenses are secure and uses optics to reduce the effects of crop factor by making the lens 0.64x wider and simultaneously increasing the maximum aperture by about 1-1/3 stop. Further improving on previous generations of Smart Adapters, this fifth-generation model now features a rubber gasket to protect the camera's mount from dust and moisture.
In Stock
$699.00
$59/mo. suggested payments for 12 Mos.
with the credit card.§ 
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Add a protection plan from $95.99
Magnification
0.64x
0.71x

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Metabones MB_SPEF-M43-BT6 Overview

Boost the performance of your full-frame Canon EF-mount lenses when mounted to your Micro Four Thirds camera with this fifth-generation T CINE Speed Booster XL 0.64x from Metabones. This cinema-styled electronic adapter features a positive-lock lens mount that will ensure that your adapted lenses are secure and uses optics to reduce the effects of crop factor by making the lens 0.64x wider and simultaneously increasing the maximum aperture by about 1-1/3 stop. Further improving on previous generations of Smart Adapters, this fifth-generation model now features a rubber gasket to protect the camera's mount from dust and moisture.

This adapter is equipped with numerous capabilities thanks to the use of a high-performance processor. The features include support for autofocus as well as the ability to control the aperture from the camera body. Smooth iris effects are possible as well on select lenses and 5-axis stabilization is available thanks to communication of information with supported lenses. Also, it enables electronic (focus-by-wire) manual focusing, transmits Exif data to the camera, and works with in-lens image stabilization. Additionally, distance and zoom is displayed on certain camcorders and mirrorless cameras and Cinema EOS lenses are supported when running the adapter off an external 5 VDC power supply via the micro-USB port.

Beyond electronic communication, the adapter has many physical advantages as well, such as a black felt flocking on the inside of the adapter that prevents reflections. For larger lenses, there is a removable Arca-type-compatible tripod foot with a 1/4"-20 thread on the base.

Allows users to adapt a full-frame Canon EF-mount lens to a Micro Four Thirds camera.
Optics are used with a 0.64x magnification to reduce crop factor from 2x to 1.28x and simultaneously improve the maximum aperture by one stop.
An advanced optical design with 6 elements in 4 groups that will help improve sharpness and performance of adapted lenses.
Positive-lock lens mount provides extra security when attaching large lenses.
Receives power from camera body or optional 5 VDC power supply via micro-USB port.
Electronic contacts permit transmission of data between the lens and camera enabling autofocus, auto exposure, image stabilization, aperture control from the camera body, saving Exif information, and more.
Smooth iris support with select Canon (2009 and later), Tamron (SP series 2013 and later), and Sigma (2016 and later) lenses.
Enables electronic manual focusing on lenses, such as the Canon EF 85mm f/1.2L II, that use a focus-by-wire system.
Support for distance and zoom display.
Internal felt flocking prevents reflections.
Covers 4K video area on GH4 when using APS-C format lenses.
Cinema EOS lenses are supported when an external 5 VDC power supply is used, including autofocus, auto iris, and servo zoom.
Removable Arca-type compatible tripod foot with 1/4"-20 thread.
Powered by camera body.

Metabones MB_SPEF-M43-BT6 Specs

Adapter
Camera MountMicro Four Thirds
Lens MountCanon EF
Magnification0.64x
Optical Design6 Elements in 4 Groups
Packaging Info
Package Weight0.855 lb
Box Dimensions (LxWxH)5.05 x 4.75 x 2.4"

Metabones MB_SPEF-M43-BT6 Reviews

a must have for seamless focus

By Stephen
Rated 5 out of 5
Date: 2019-06-17

zero flex when pulling focus on cinema lenses. The lock is a bit tight on some L series zooms like the 24-105 f/4, but it still fits. It just takes a little getting used to.

Wish lenses mounted easier

By Pro Photog Ry
Rated 4 out of 5
Date: 2018-09-06

Summary: Works great once set up but mounting lenses can be rough. Essential piece of gear to mount EF lenses on a GH5s but, wow, they are not easy to mount. First time took me about 15 minutes to change lenses because the alignment is so difficult, seriously I'm getting (much) faster but I still wish it was a bit quicker to find that sweet spot. Once they're locked though, they are definitely locked. Also worth noting is that the adapter comes packaged nicely inside a sturdy plastic case. Inside one finds no instructions or suggestions, let alone encouragement for the lens mounting challenges ahead. A few minutes on Youtube and various forums led me to download the Metabones desktop app from their website and upgrade the firmware before using it. This, of course, required using a cable, which was not provided, to connect the adapter to the computer via a micro USB port cleverly hidden below the silver ring. It's all working out now but, even for something this straight forward, it would be nice if, for $700 no less, the packaging at least directed you to the appropriate webpage to save some time and frustration.

Cage Mounting issues

By Timothy
Rated 4 out of 5
Date: 2018-03-05

The foot for mounting, is slightly lower probably because of the larger diameter. This poses problems with several cages. There is no cage out there that can secure this adaptor to the cage. It can only be secured via mounts that are attached to the 15mm LWS baseplate. This poses issues when you want to remove the cage from the baseplate. With the non PL Metabones, the foot lines up with Movcams metabones brace or if you remove the foot, you can screw in a Metbones brace from Wooden camera or Small rig. I'm currently having to get a bracket machined.� The PL mount itself is excellent. Not nearly the hassle some make it out to be. You'll be used to it by lunch.

Nearly perfect,

By Dakota
Rated 4 out of 5
Date: 2018-01-16

I've owned quite a few generations and different models of Speedboosters and Smart Adapters from Metabones. This one is almost perfect. This does not lock like a locking EF mount on a RED where you twist and click the lens on and then tighten the extra ring lock to fully secure it. On the Metabones CINE the lens DOES NOT rotate to lock, only the ring rotates. That means you have to hold the lens in place against the mount and turn the ring to secure the lens otherwise it will just fall out. This makes swapping lenses not nearly as fast or as easy to do. You may get used to it over time, but if you change lenses often it's something to keep in mind. I personally love the locking mount but I know some people will NOT like it at all. If you can, try it before you buy it.

Finicky but better than the standard version

By John
Rated 4 out of 5
Date: 2019-01-06

Despite it being a little troublesome with some EF mounts its worth the effort to have a positive lock on your lens and no wiggle room.

Back Focus Issues with Apochromatic Lenses

By Adam
Rated 4 out of 5
Date: 2018-09-07

I do like the locking mount of this speed booster, there is no wiggle between the mount and the lens. For me this totally outweighs the slightly more difficult mounting process over the original speed boosters (it's really not that hard). However, I did discover (and i'm assuming this goes for all speed boosters) that they are designed and optimized for floating-element lenses. They will not focus to infinity with MY apochromatic lenses (slr magic apo hyperprimes), and not even close for that matter... my 25mm for example at infinity focus is sharp at distance of about 5 feet. You can adjust the back focus on the speed booster, but not nearly to this extreme. I should add that the lenses back focus perfectly when not used with a speed booster. Anyways, This won't be an issue for the vast majority, but I thought it was worth mentioning.

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How do I tighten the lens lock? Mine seems to ...

How do I tighten the lens lock? Mine seems to have gone loose a bit.
Asked by: Takeshi
If your not able to tighten it like when it was new, I would recommend contacting Metabones. Their contact info is; Website http://www.metabones.com/ Email [email protected]
Answered by: Rob
Date published: 2019-08-07

One reviewer said that EF lenses with a ...

One reviewer said that EF lenses with a weather-seal gasket, like the 16-35mm f/2.8L II, won't fit onto this Cine mount. Has anyone else had that problem?
Asked by: Brent
It will fit with all EF lenses, gasketed lenses need a little bit more compression to overcome the gasket.
Answered by: Rob
Date published: 2021-02-19

The locking mechanism makes the lens less loose ...

The locking mechanism makes the lens less loose in the mount but how solid is the connection between the camera and the adapter? I assume you still have to twist to get the adapter on in the first place.
Asked by: Jingyi
The section mounting to the camera is no more or less secure than any micro four thirds mount.
Answered by: Patrick
Date published: 2019-07-03

question

Does this work with the new GH5S?
Asked by: Christian S.
Works fine. Autofocus on video is better than Panasonic optics =))))
Answered by: Valentin G.
Date published: 2019-07-05

question

Hello! will this work with new Blackmagic Design Pocket Cinema Camera 4K? Thanks
Asked by: Asan D.
That depends on the glass you are using. If you use full frame lenses then it will work without any vignetting. If you are using APS-C lenses then the .71x is the choice.
Answered by: Kevin
Date published: 2019-08-23
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