Rent a Canon EF Lens to Sony NEX Metabones Speed Booster ULTRA | BorrowLenses
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Canon EF Lens to Sony NEX Metabones Speed Booster ULTRA
Canon EF Lens to Sony NEX Metabones Speed Booster ULTRA


The Canon EF Lens to Sony NEX Metabones Speed Booster ULTRA is an electronic adapter that allows you to pair select Canon EF mount lenses with select crop sensor Sony E mount cameras (or full frame Sony E mount cameras in crop sensor mode) and increases the effective field of view and the maximum aperture of the lens you're using. This combats the crop factor of your APS-C camera while allowing you to use your favorite Canon EF mount lenses.

This Speed Booster works by shrinking the image circle of your Canon EF lens down to better fit APS-C 1.5x crop sensors. This has the effect of making the field of view of the lens wider or, in other terms, reducing the crop factor of the camera from 1.5x to 1.07x – nearly full frame. For example, your Canon 40mm f/2.8 STM lens becomes an effective 42.8mm with this Speed Booster on an APS-C sensor instead of the 60mm effective view you'd have with a straight adapter. Additionally, by concentrating the image circle from a lens, this Speed Booster also "brightens" the image – maximum lens apertures are increased by approximately 1 stop down to the sub-f/1.0 range. Lastly, the Metabones Canon EF Lens to Sony NEX Speed Booster ULTRA supports Smooth Iris functionality in certain lenses (see the Notes tab for more). This adapter is ideal for those who want to use their full frame Canon lens collection on Sony E mount cameras that have either APS-C sensors, Super 35 sensors, or ASP-C/Super 35 modes without sacrificing angle of view.

Please see the "Notes" section for important information about autofocus and lens compatibility.


  • • This Speed Booster is compatible only with EF mount lenses and not Canon EF-S mount lenses.
  • • This Speed Booster is designed for cameras with APS-C sensors. If you are using a full frame E mount (FE) camera, please make sure "APS-C/Super 35mm" is set to either "Auto" or "On".
  • • The first two AF attempts are used to calibrate the lens. Half-press the shutter release button again after that and AF will lock successfully.
  • • While technically compatible with any EF mount lens, please take notice if your third-party lens has any mount protrusions, like spikes or levers. These will damage the Speed Booster.
  • • Autofocus is supported with this Speed Booster but with certain contrast/phase detection limitations. Please see the notes below about lens compatibility.
  • • If you are attempting to pair both a Canon lens with a Canon extender to this Speed Booster, autofocus is disabled if the combined maximum aperture of the lens and the extender is f/5.6 or smaller (higher number).
  • • Use of this Speed Booster with a body using an aftermarket battery grip may result in strange aperture changes. Turn off the battery grip if you experience this. Behavior is not found when using Sony-branded grips.
  • • The Sony NEX-VG900 is not compatible with this adapter.
  • • The following lenses have been tested by Metabones community members and then sanctioned by Metabones. Please visit Metabones' website for the most recent results:

  • Canon EF 8-15mm f/4L Fisheye (Supports Smooth Iris)
  • Canon EF 14mm f/2.8L II
  • Canon EF 11-24mm f/4L
  • Canon EF 16-35mm f/2.8L USM
  • Canon EF 16-35mm f/4L IS USM
  • Canon EF 20-35mm f/3.5-4.5
  • Canon EF 24mm f/1.4L
  • Canon EF 24-70mm f/4L IS
  • Canon EF 24-105mm f/4L IS
  • Canon EF 28-80mm f/3.5-5.6 II
  • Canon EF 28-300mm f/3.5-5.6L
  • Canon EF 35mm f/1.4L II
  • Canon EF 35mm f/2L IS
  • Canon EF 35-350mm f/3.5-5.6L
  • Canon EF 40mm f/2.8 STM (Supports Smooth Iris)
  • Canon EF 50mm f/1.2L
  • Canon EF 50mm f/1.4
  • Canon EF 50mm f/1.8 STM (Supports Smooth Iris)
  • Canon EF 70-200mm f/2.8L
  • Canon EF 70-200mm f/2.8L IS
  • Canon EF 70-200mm f/2.8L IS II (Supports Smooth Iris)
  • Canon EF 70-200mm f/4L IS
  • Canon EF 70-200mm f/4L
  • Canon EF 70-300mm f/4-5.6L IS (Supports Smooth Iris)
  • Canon EF 75-300mm f/4-5.6 IS
  • Canon EF 85mm f/1.2L II
  • Canon EF 85mm f/1.8
  • Canon EF 100mm f/2.8L IS Macro (Supports Smooth Iris)
  • Canon EF 100-400mm f/4.5-5.6L IS
  • Canon EF 100-400mm f/4.5-5.6L IS II (Supports Smooth Iris)
  • Canon EF 180mm f/3.5L Macro
  • Canon EF 200mm f/2.8L II
  • Canon EF 300mm f/4L IS
  • Canon EF 400mm f/5.6L
  • Canon EF 400mm f/2.8L IS
  • Canon EF 500mm f/4L IS
  • 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 35mm f/1.4 DG HSM Art
  • Sigma 50mm f/1.4 DG HSM
  • Sigma 24-105mm f/4 Art
  • Sigma 12-24mm f/4.5-5.6 (Version 1 Only)
  • 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
  • Tamron SP 15-30mm f/2.8 VC USD A012 (Supports Smooth Iris)
  • Tamron SP 24-70mm f/2.8 Di VC USD A007
  • Tamron SP 45mm f/1.8 Di VC USD F013 (Supports Smooth Iris)
  • Tamron SP 70-200mm f/2.8 Di VC USD A009 (Supports Smooth Iris)
  • Tamron 70-300mm f/4-5.6
  • Tamron SP 90mm f/2.8 Macro
  • Tamron 150-600mm f/5-6.3 VC USD A011 (Supports Smooth Iris)

  • • The following are compatible but cannot contrast-detect effectively at all. Phase detection AF only or manual focus only are recommended:

  • Canon EF 24-70mm f/2.8L II
  • Canon EF 28-70mm f/3.5-4.5 II
  • Canon EF 35mm f/1.4L
  • Canon EF 50mm f/1.8 II
  • Canon EF 100mm f/2.8 Macro
  • Canon EF 135mm f/2L

  • • Front Cap
  • • Rear Cap
  • • Detachable Tripod Foot
  • • Allen Wrench
  • • Carrying Case

  • • Increases Maximum Aperture by 1 Stop and Increases Angle of View By 0.71x
  • • Retains Electronic Communication Between Lens and Camera
  • • Powered by Camera Body
  • • Retains Autofocus (See Notes for More)
  • • Allows Aperture Control with Your Camera
  • • Fast Contrast Detection AF on E Mount Cameras (Except with Sony A9 – See Notes)
  • • Supports 5-Axis Image Stabilization of a7 II, a7R II and a7S II
  • • Supports Image Stabilization of Lenses
  • • Supports Auto APS-C Size Capture on Full Frame a7 Series Cameras

    There is no manual for this product.


    Canon EF Lens to Sony NEX Metabones Speed Booster ULTRA

    Rent a Canon EF Lens to Sony NEX Metabones Speed Booster ULTRA. BorrowLenses provides rentals for professional photographers, videographers, and photography/videography hobbyists.
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