The Metabones T Speed Booster XL 0.64x Adapter for Full-Frame Canon EF mount lenses to Micro Four-Thirds mount cameras is the latest in the EF-m43 speed booster line (version 3). This adapter’s optics provide 0.64x Micro 4/3 crop factor compensation — meaning it provides a 1.3 stop increase for the camera over the lens’s natural aperture range.
“Full Frame” camera users, particularly those with a micro four-thirds size sensor, are familiar with the problem of image cropping when using adapters: full-frame lenses typically project an image larger than the m4/3 sensor is built to accept. 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.
In select cameras, the Metabones SPEF-m43-BT2 supports in-camera aperture control, autofocus, and image stabilization. Moreover, in a lens capable of generating EXIF metadata this adapter facilitates that flow of information.
| BRAND |
MICRO FOUR THIRDS CAMERA MODEL |
| Blackmagic |
Cinema Camera |
Pocket Cinema Camera |
Micro Cinema Camera (HD) |
Micro Studio Camera (4K) |
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| JVC |
GY-LS300 |
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| Olympus |
E-M5 |
E-M1 |
E-M10 |
E-M5 II |
E-M1 II |
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| PEN-F |
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| E-P1 |
E-P2 |
E-P3 |
E-P5 |
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| E-PL1 |
E-PL2 |
E-PL3 |
E-PL5 |
E-PL6 |
E-PL7 |
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| E-PM1 |
E-PM2 |
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| Panasonic |
AF100 |
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| GH1 |
GH2 |
GH3 |
GH4 |
GH5 |
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| G1 |
G2 |
G3 |
G5 |
G6 |
G7 |
G10 |
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| GF1 |
GF2 |
GF3 |
GF5 |
GF6 |
GF7 |
GF8 |
GF800/850/9 |
| GX1 |
GX7 |
GX8 |
GX80/85 |
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| GM1 |
GM5 |
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The Metabones T Speed Booster XL0.64x EF to M4/3 adapter features an integrated jog dial for incremental aperture adjustment. In compatible Panasonic cameras, the adapter gives push-button access to the lens’s widest aperture setting. It’s built with six lens elements in four groups and can be powered either by the camera body or bay a third-party external 5V power source (not included). The Speed Booster XL also sports a detachable tripod foot with 3/8″ threads.
Autofocus Lens Compatibility
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Accurate
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Tested by the community, thanks!
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Accurate only on newer cameras such as Panasonic G7, GX8 and GX80/85
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Canon EF 8-15mm f/4L USM Fisheye*
Canon EF 20-35mm f/3.5-4.5 USM
Canon EF 24-105mm f/4L IS USM
Canon EF 28-80mm f/3.5-5.6 II
Canon EF 35-80mm f/4-5.6
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 STM*
Canon EF 70-200mm f/2.8L IS II USM*
Canon EF 70-300mm f/4-5.6L IS USM*
Canon EF 85mm f/1.2L II USM
Canon EF 100mm f/2.8L IS Macro USM*
Canon EF 100mm f/2.8 Macro USM
Canon EF 100-400mm f/4.5-5.6L IS USM
Canon EF 100-400mm f/4.5-5.6L IS II USM*
Canon EF Extender 1.4x III
Canon EF Extender 2x
Sigma 18-125mm f/3.8-5.6 DC HSM
Sigma 24-105mm f/4 Art
Tokina AT-X PRO 11-16mm f/2.8 DX II
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Canon EF 70-200mm f/2.8L IS USM (Mark I)
Canon EF 85mm f/1.2L USM (Mark I)
Canon EF 200mm f/2.0L IS USM
Canon EF 300mm f/2.8L IS USM (Mark I)
Canon EF 400/2.8L IS USM (Mark I)
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Canon EF 70-200mm f/4L USM (non-IS)
Canon EF 135mm f/2L USM
Canon EF 200mm f/2.8L II USM
Canon EF 300mm f/4L IS USM
Canon EF 400mm f/5.6L USM
Sigma 18-35mm f/1.8 DC Art
Sigma 50-100mm f/1.8 DC HSM Art 016*
Tamron SP 15-30mm f/2.8 VC USD A012*
Tamron SP 45mm f/1.8 VC USD F013*
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Inaccurate
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Require external USB power supply owing to high current consumption; AF inaccurate
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Canon EF 50mm f/1.8 II
Sigma 50mm f/1.4 EX HSM
Tamron 18-250mm f/3.5-6.3 Di II Macro A18
Tamron SP 24-70mm f/2.8 Di VC USD A007
Tamron SP 70-200mm f/2.8 Di VC USD A009*
Tokina AT-X PRO 11-16mm f/2.8 DX (I)
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Tamron 28-300mm f/3.5-6.3 XR Di VC A20
Tamron 150-600/5-6.3 VC USD A011*
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Manual focus only
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Not supported
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Contax N lenses modified by Conurus
Tamron SP 17-50mm f/2.8 VC B005
Zeiss ZE lenses
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Focus confirmation "chips"
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