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Metabones T Speed Booster XL 0.64x Adapter for Full-Frame Canon EF-Mount Lens to Select Micro Four Thirds-Mount Cameras

BH #MESPEFM43BT3 • MFR #MB_SPEF-M43-BT3
Metabones
Metabones T Speed Booster XL 0.64x Adapter for Full-Frame Canon EF-Mount Lens to Select Micro Four Thirds-Mount Cameras
Key Features
  • Canon EF Lens to Micro 4/3 Body
  • Full-Frame Lens to Micro 4/3 Camera Body
  • Supports In-Camera Aperture Control
  • 0.64x Micro 4/3 Crop Factor Compensation
The T Speed Booster XL 0.64x Adapter for Full-Frame Canon EF-Mount Lens to Select Micro Four Thirds-Mount Cameras from Metabones allows a full-frame Canon EF-mount lens to be mounted onto a Micro Four Thirds-mount camera. While doing so, the adapter's optics help to maximize the connected lens's apparent angle of view while providing a 1.3-stop increase for the camera over the lens's aperture range.
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Metabones MB_SPEF-M43-BT3 Overview

The T Speed Booster XL 0.64x Adapter for Full-Frame Canon EF-Mount Lens to Select Micro Four Thirds-Mount Cameras from Metabones allows a full-frame Canon EF-mount lens to be mounted onto a Micro Four Thirds-mount camera. While doing so, the adapter's optics help to maximize the connected lens's apparent angle of view while providing a 1.3-stop increase for the camera over the lens's aperture range.

If a lens intended for 35mm film or similarly-sized "full frame" camera sensors is connected to a camera with a Micro Four Thirds-sized sensor, it would project an image larger than the Micro Four Thirds sensor was built to accept. 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 Speed Booster XL 0.64x Adapter for Full-Frame Canon EF-Mount Lens to Select Micro Four Thirds-Mount Cameras condenses the light from a lens designed for 35mm film or "full frame" camera sensors and projects it onto a Micro Four Thirds sensor. This allows a Micro Four Thirds 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 1.3 stops of light for each of the lens's f/stop settings.

This adapter is constructed from aluminum alloy for durability while minimizing weight and its mounting rings are made with brass to further prevent wear-and-tear. Inside are six lens elements in four groups that are designed to provide optical clarity as well as color fidelity, and a detachable tripod foot is included that features 3/8" threads as well as compatibility with Arca-Swiss tripod heads.

The T Speed Booster XL 0.64x Adapter for Full-Frame Canon EF-Mount Lens to Select Micro Four Thirds-Mount Cameras 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 those features to be used. Also, if an attached lens is capable of generating EXIF metadata when used with a directly compatible camera, the T Speed Booster XL 0.64x Adapter for Full-Frame Canon EF-Mount Lens to Select Micro Four Thirds-Mount Cameras is designed to allow that information to be saved along with image files generated with a combination of the lens, a compatible Micro Four Thirds-mount camera, and the adapter.

This adapter can be mounted onto the Panasonic DMC-GH4, GH3, G3, G5, G6, G10, GF3, GF5, GF6, and GX1 Mirrorless Micro Four Thirds Digital Cameras; the Olympus PEN E-PL7 Mirrorless Micro Four Thirds Digital Camera; the Blackmagic Cinema Camera with Micro Four Thirds mount; and the Blackmagic Pocket Cinema Camera.

  • Allows a full-frame Canon EF-mount lens to be used with a Micro Four Thirds-mount camera
  • Maximizes apparent angle of view of combined camera and lens
  • Provides a 1.3-stop increase for the camera over the lens's aperture range
  • Integrated jog dial for incremental aperture adjustment and push-button access to lens's widest aperture setting when used with a compatible Panasonic camera
  • Six lens elements in four groups for optical clarity as well as color fidelity
  • Supports electronic communication between camera and lens to enable autofocus, image stabilization, on-camera aperture control, and EXIF metadata generation when possible
  • Internal coating minimizes reflections within the adapter barrel
  • Detachable, Arca-Swiss compatible tripod foot with 3/8" threads
  • Aluminum alloy components for weight reduction
  • Brass mounting rings prevent wear-and-tear
  • Locking mechanism for secure attachment of lens with push-button release

Metabones MB_SPEF-M43-BT3 Specs

Adapter
Camera MountMicro Four Thirds
Lens MountCanon EF
Magnification0.64x
Optical Design6 Elements in 4 Groups
Physical
Dimensionsø: 2.6 x D: 0.9" / ø: 6.5 x D: 2.4 cm
Weight6.0 oz / 170.0 g
Packaging Info
Package Weight0.7 lb
Box Dimensions (LxWxH)4.3 x 4.3 x 2.4"

Metabones MB_SPEF-M43-BT3 Reviews

Zero technical support/GH5-GH6 autofocus issues.

By Diogo
Rated 3 out of 5
Date: 2022-04-05

Don't expect any answer from their technical support department. Auto-focus for video on the GH5 and GH6 does not work properly. Tried updating firmware, and issues persist. Contacted Metabones directly a couple of times without any response. Aside from that, it is solidly built, and works fine (image-quality wise) for video on the cameras mentioned above.

Must have for the Pocket 4k

By Daniel
Rated 5 out of 5
Date: 2020-12-30

This works as intended. It is a requirement in my opinion for the BMPCC4K. It makes the camera even more compelling than the 6k variant because the equivalent sensor size is bigger than the Pocket 6k's super 35mm sensor. This speedbooster gives you the widest field of view and allows the most light to hit the sensor compared to the .71x version of this adapter. This is a no brainer. Both of my Pocket 4k's have this speedbooster on them.

It works

By Jordan
Rated 5 out of 5
Date: 2020-07-05

It does what it is meant to do, it works right out of the box.

Must have.

By Jonathan
Rated 5 out of 5
Date: 2020-05-21

Bought this to pair with my BMPCC 4K so I could continue to utilize my EF Mount cine lenses. I wouldn’t want to shoot without the speed booster. Larger field of view. More light. More glass options. There really aren’t any down sides to owning one.

Works Perfectly for Me

By Marc
Rated 4 out of 5
Date: 2020-01-16

Well-designed, solidly constructed, and basically transparent once you snap it on and begin to shoot. I use mine with a Panasonic Lumix GH5S and Canon EF lenses. It's a match made in heaven as it gives me a wider field of view and gives me about 1 full stop on the aperture. I really like the threaded tripod mount, which works well with my Sachtler. It's win-win-win in every way. And while it worked right out of the box, I have to say that their website--the entire domain and all of the pages and navigation--absolutely sucks. It's almost impossible to locate--much less understand--their online instructions, owners manual (it's a single unmarked web page--nothing in the box), FAQ, downloads, etc. There is also absolutely no way to contact the manufacturer. It's almost as if they're trying to avoid their customers. I finally gave up trying to determine if I needed the firmware upgrade, and just started shooting. That's when it got fun again.

Works great for video yo.

By Steve
Rated 5 out of 5
Date: 2019-11-12

Look at the title, now back to me. Clearly the title is all you need.

Must Adapter

By Erik
Rated 5 out of 5
Date: 2022-03-11

Works great, love the extra stops of light.

Quality is worth the price

By Michael
Rated 5 out of 5
Date: 2021-12-02

I've been using the GH5 for a while now, and I knew it was only a matter of time before I'd choose to invest in a speed booster. There was a point I almost caved and bought the Viltrox instead of this, but I am so happy that I went with the Metabones. The value is evident in the build quality, and the firmness of the adapter as it holds any given lens. I had searched extensively online to look for comparisons with and without a speed booster, but until I could witness it firsthand, I had no idea what to expect! It really is a game changer!

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Asked by: Dane
Sorry I don't know.
Answered by: EDI
Date published: 2020-08-18

Hi, Does it work with Olympus OMD E-M5 MkIII ...

Hi, Does it work with Olympus OMD E-M5 MkIII camera?
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It works with all micro four third cameras. But it not good for follow focus mode. I use it on GH4 with canon EF lenses 16-35 F2.8, canon 70-200 F2.8, 50 mm F1.4. Its good for change F 2.8 to 1.8 but follow focus mode is very bad.
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Asked by: Jason
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Does the Metabones T Speed Booster XL 0.64 ...

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Hi every one. I have HG4 and metabones ...

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