Metabones Canon EF to Sony FE/E T Speed Booster ULTRA 0.71x (Black Matt)

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  • Canon EF Lens to Sony E Mount
  • Increases maximum aperture by 1 stop
  • Increases MTF
  • Makes lens 0.71x wider
  • Advanced 5-element/4-group optical design
  • True electronic integration of aperture diaphragm
  • Powered by camera body
  • Detachable tripod foot
  • High performance 32-bit processor 
  • Flocking material coating inside the inner hole
Our Price: $649.00

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The Metabones Canon EF to Sony FE/E T Speed Booster Ultra is a nifty accessory that enables your E-mount camera to capture crystal clear photos using your Canon EF lenses on a Sony FE or E mount body. 

The adapter boasts an impressive magnification rating of 0.71x, which effectively reduces the crop factor from 1.5x to 1.07x for all mirrorless cameras that are equipped with DX-sized sensors.

This accessory is powered by the camera body itself, which means that no external power source is needed for it.

The Metabones Canon EF to Sony FE/E  T Speed Booster ULTRA 0.71x is NOT COMPATIBLE with Canon's EF-s Lenses. Please see the list of compatible lenses listed below.

Tested Camera Bodies:


A7 Series: A7S II, A7R II*, A7II*, A7S, A7R, A7;

A6300, A6000;

NEX-7, NEX-6, NEX-5R, NEX5N, NEX-5, NEX-C3, NEX-3.


PXW-FS7**, PXW-FS5, NEX-FS700**, NEX-FS100**;

NEX-EA50, NEX-VG900, NEX-VG30, NEX-VG20, NEX-VG10.

*A7RII and A7II supports on contrast-detect autofocus during video recording. 

**With the FS7, FS700, and FS-100, autofocus will only work in photo mode. It is disabled in movie capture mode. 

Supported Lenses:

  • Canon EF 8-15mm f/4L USM Fisheye
  • Canon EF 11-24mm f/4L USM
  • Canon EF 14mm f/2.8L II USM
  • Canon EF 16-35mm f/2.8L USM
  • Canon EF 16-35mm f/4L IS USM
  • Canon EF 24mm f/1.4L USM
  • Canon EF 24-70mm f/2.8L II USM
  • Canon EF 24-70mm f/4L IS USM
  • Canon EF 24-105mm f/4L IS USM
  • Canon EF 28-80mm f/3.5-5.6 II
  • Canon EF 28-300mm f/3.5-5.6L USM
  • Canon EF 35mm f/2L IS USM
  • Canon EF 35-350mm f/3.5-5.6L USM
  • 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 50mm f/1.8 II
  • Canon EF 70-200mm f/2.8L IS USM (Mark I)
  • Canon EF 70-200mm f/2.8L USM (non-IS)
  • Canon EF 70-200mm f/2.8L IS II USM
  • Canon EF 70-200mm f/4L IS USM
  • Canon EF 70-200mm f/4L USM
  • Canon EF 70-300mm f/4-5.6L IS USM
  • Canon EF 75-300mm f/4-5.6 IS USM
  • Canon EF 85mm f/1.2L II USM
  • Canon EF 85mm f/1.8 USM
  • Canon EF 100mm f/2.8L Macro IS 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 135mm f/2L USM
  • Canon EF 180mm f/3.5L Macro USM
  • Canon EF 200mm f/2.8L II USM
  • Canon EF 300mm f/4L IS USM
  • Canon EF 400mm f/2.8L IS USM (Mark I)
  • Canon EF 400mm f/5.6L USM
  • Canon EF 500mm f/4L IS USM (Mark I)
  • Canon EF Extender 1.4x III
  • Canon EF Extender 2x II
  • Sigma 20mm f/1.4 DG HSM Art
  • Sigma 24mm f/1.4 DG HSM Art
  • Sigma 24-105mm f/4 DG OS Art
  • Sigma 35mm f/1.4 DG HSM Art
  • Sigma 50mm f/1.4 Art
  • Sigma 50mm f/1.4 DG HSM
  • Sigma 50-500mm f/4-6.3 OS HSM
  • Sigma 70-200mm F2.8 APO EX DG OS HSM
  • Sigma 85mm f/1.4 EX DG HSM
  • Sigma 150mm f/2.8 Macro
  • Sigma 150-600mm f/5-6.3 OS HSM Contemporary
  • Tamron SP 15-30mm f/2.8
  • Tamron SP 24-70mm f/2.8 Di VC USD A007
  • Tamron SP 45mm f/1.8 Di VC USD F013
  • Tamron SP 70-200mm f/2.8 Di VC USD A009
  • Tamron 70-300mm f/4-5.6
  • Tamron SP 90mm f/2.8 Macro
  • Tamron 150-600mm f/5-6.3


  • Phase-detect AF is available only on A7Rii and A7ii. On other Sony cameras, Contrast-detect AF with an EF mount lens may be inadequate for all but stationary or static subjects. 
  • Even with the phase-detect AF on the A7Rii and A7ii, you may experience some "hunting" with longer telephoto lenses, with "autofocus performance progressively [deteriorating] as focal length gets longer." 
  • On the A7Rii, the center AF points will always be the best.
  • Continuous AF is NOT SUPPORTED.
  • Autofocus accuracy depends heavily on the working condition of the lens. Lenses with hidden problems - which may not be apparent on Canon DSLRs- will lead to inaccurate and unreliable autofocus on your Sony NEX or Alpha camera. 
  • There is no support for lens corrections, such as peripheral shading, CA, and/or distortion. 
  • Some aftermarket battery grips may cause an erratic change in aperture while shooting. 
  • Sony NEX cameras cannot display aperture values beyond f/1.0. If a f/1.2 Canon EF lens is used with the Speed Booster ULTRA, the resulting aperture is f/0.9, but the body displays the original aperture, f/1.2, to the body. 
  • When the Speed Booster is used with the Sony A7 series, the body will turn on APS-C Capture mode. You cannot use a Speed Booster in Full-Frame Capture with a full-frame Sony Camera. 

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Physical Specifications
Color: Black
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Brand: Metabones

In The Box

  • Metabones Canon EF to Sony FE/E  T Speed Booster ULTRA 0.71x (Black Matt) MB_SPEF-E-BT2

Included in Rental:

  • Metabones Canon EF to Sony FE/E T Speed Booster
  • Case
  • Caps
  • Lens Support Bracket

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