Metabones EF to E Mount T Speed Booster ULTRA II

  • Metabones EF to E Mount T Speed Booster ULTRA II
  • Metabones EF to E Mount T Speed Booster ULTRA II Back View


Metabones EF to E Mount T Speed Booster ULTRA II

  • Adapts Select EF Lenses to E Mount cameras
  • Increases Maximum Aperture by 1 Stop & Increases Angle of View By 0.71x
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The Metabones EF to E Mount T Speed Booster ULTRA II improves on its predecessors by incorporating a new optical design with extraordinary sharpness with reduced distortion and vignetting. This electronic adapter allows you to pair Canon EF mount lenses with Sony E mount cameras 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 (or APS-C mode) while allowing you to use your favorite Canon EF mount lenses. This recent ULTRA redesign is made specifically to perform better with the professional-grade glass found in Canon's L series full frame f/2.8 zoom 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. 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. Lenses like the Canon 24-70mm f/2.8L II and Canon 70-200mm f/2.8L IS II become 17-50mm f/2 and 50-142mm f/2 high-speed zooms, respectively. Lenses like the Canon 50mm f/1.2L become an effective 35.5mm f/0.9 lens.

Please note that these effective focal ranges quoted by Metabones are in full frame terms. You still have to consider the 1.5x crop factor of your APS-C Sony camera (or APS-C Sony mode), making that 35.5mm equivalency read more like 53.25mm. This is the point of the Speed Booster. It allows the full frame lens (in this example, a 50mm) actually produce a field of view closer to 50mm rather than the 75mm effective view you'd get with a straight (non-boosting) adapter. In addition to this is the aperture boost.

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.

  • 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)
  • Dedicated Switch Controls In-Body Image Stabilization (IBIS) on Sony cameras with SteadyShot INSIDE.
  • Supports 5-Axis Image Stabilization of a7 II, a7R II and a7S II

  • Supports Image Stabilization of Lenses
  • Supports Electronic manual Focusing (Found in Canon 85mm f/1.2L II Lens)
  • Supports Auto APS-C Size Capture on Full Frame cameras

  • Canon EF Lens to Sony E Mount camera Metabones T Speed Booster ULTRA II

  • Front Cap

  • Back Cap

  • Detachable Tripod foot

  • Allen Wrench

  • Carrying case

  • 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 camera, please make sure "APS-C/Super 35mm" is set to either "Auto" or "On".
  • This Speed Booster will not operate correctly when trying to use it on Canon's CN-E collection of cinema lenses for still photography purposes. This Speed Booster is functional with Compact-Servo CN-E lenses but note that some do not fully cover APS-C/Super 35mm when paired with this adapter.
  • 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). Note that this adapter is not at all compatible with Sony extenders.
  • 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 following E mount camera bodies have been tested by Metabones for use with this Speed Booster:

    • Sony a9, a9 II
    • Sony a7S, a7S II, a7S III
    • Sony a7R, a7R II, a7R III, a7R IV
    • Sony a7, a7 II, a7 III
    • Sony a5000, a6000, 63000, a6500, a6600
    • FS7, FS7 II, FS5, FS5 II, FS700, FS100
    • PXW-FX9 (Crop Mode Only), VENICE (Crop Mode Only)
    • NEX-EA50, NEX-VG900, NEX-VG30, NEX-VG20, NEX-VG10
    • NEX-7, NEX-6, NEX-5R, NEX-5N, NEX-5, NEX-C3, NEX-3

      • The following lenses have been tested by Metabones community members and then sanctioned by Metabones. Please note that, as of this writing, all of the following only support phase detection AF in the Sony a9. This list will expand over time. 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

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