Metabones EF to BMPCC T Speed Booster | BorrowLenses
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Metabones EF to BMPCC T Speed Booster
Metabones EF to BMPCC T Speed Booster


The Metabones EF to BMPCC T Speed Booster allows you to pair select Canon EF mount lenses with the Blackmagic Pocket Cinema Camera in Micro Four Thirds mount. It increases the effective field of view and the maximum aperture of the lens you're using. This is handy for achieving wider views with more dramatic depth of field effects on what is otherwise a sometimes uncompromising camera sensor due to its small 16mm size.

The Speed Booster works by shrinking the image circle of your Canon EF lens down to better fit the smaller 16mm sensor. This has the effect of making the field of view of the lens 0.58x wider or, in other terms, reducing the crop factor of the camera from 2.88x to 1.75x. For example, a 30mm lens becomes an effective 52.5mm with this Speed Booster on a Blackmagic Pocket Cinema Camera instead of the 86.4mm effective view you'd have with a straight adapter. This is closer to the APS-C view of around 45/48mm for this particular lens example. Your Micro Four Thirds mount BMPCC will render less like a 16mm sensor and more like the larger APS-C or Super 35 sensor thanks to this Speed Booster, plus you have the benefit of using a wide variety of Canon EF lenses while retaining lens AF (from firmware v2.1) and image stabilization.

By concentrating the image circle from a lens, this Speed Booster also "brightens" the image – maximum lens apertures are increased by 1 and 2/3rd stops. As an example, this yields a maximum aperture of f/0.74 when using a Canon 85mm f/1.2L. This Speed Booster is powered by the camera body, so no additional power supply is needed. To reduce the drain on your camera's battery, it uses an efficient switched-mode power supply, which continually switches between on and off states and only draws power when it needs it. The Metabones EF to BMPCC T Speed Booster is a great tool for those using the Blackmagic Pocket Cinema Camera who want to also use a large selection of Canon EF mount lenses while getting that added benefit of a "boost" to both field of view and maximum aperture.

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 only compatible with the Blackmagic Pocket Cinema Camera in Micro Four Thirds mount and is not compatible with cameras like the Panasonic GH5 or GH4. It is also only compatible with the original Blackmagic Pocket Cinema Camera and its Super 16-sized sensor. It will not pair with the larger sensor of the Blackmagic Pocket Cinema Camera 4K.
  • • When using lenses with apertures faster than f/1.8, the pre-boost apertures will be displayed in the camera. For example, it won't show f/0.7 with a f/1.2 lens attached. It will show f/1.2. The widest aperture where you'll see a boost displayed is f/1.8 (which will show f/1.0). The "boosting" is still occurring, it just doesn't show it on read-out for these ultra-fast lenses.
  • • 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 (from firmware v2.1) but with the following limitations: lack of support for Continuous AF, Flexible AF, and Video AF (technically works but will hunt a lot more).
  • • 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).
  • • With STM lenses or a lens using electronic manual focusing, such as the Canon 85mm f/1.2L II, manual focus needs to be enabled on the camera body.
  • • The following EF mount lenses have been tested by Metabones for use with this Speed Booster. Other EF lenses are certainly compatible but the following have been fully vetted by Metabones:

  • Canon 20-35mm f/3.5-4.5
  • Canon 28-80mm f/2.8-4L
  • Canon 70-200mm f/2.8L
  • Canon 24-70mm f/2.8L II
  • Canon 24-105mm f/4L
  • Canon 70-200mm f/4L
  • Canon 70-300mm f/4-5.6L
  • Canon 70-300mm f/4-5.6
  • Canon 50mm f/1.8
  • Canon 50mm f/1.4
  • Canon 85mm f/1.2
  • Canon 100mm f/2.8
  • Sigma 18-200mm f/3.5-6.3
  • Zeiss 35mm f/2

  • Special Note: The Tamron SP 17-50mm F/2.8 XR Di II VC Lens is not compatible with this Speed Booster.

  • • Canon EF Lens to Blackmagic Pocket Cinema Camera Metabones T Speed Booster
  • • Front Cap
  • • Back Cap
  • • Detachable Tripod Foot
  • • Allen Wrench
  • • Carrying Case

  • • Increases Maximum Aperture by 1 and 2/3rd Stops (Up to f/0.74) and Reduces Sensor Crop Factor from 2.88x-3.02x to 1.75x (Increases Field of View by 0.58x)
  • • Retains Electronic Communication Between Lens and Camera
  • • Powered by Camera Body
  • • Retains Autofocus
  • • Allows Aperture Control with Your Camera
  • • Lens-Based Image Stabilization Supported

    There is no manual for this product.


    Metabones EF to BMPCC T Speed Booster

  • • Adapts Select EF Lenses to the Blackmagic Pocket Cinema Camera
  • • Increases Maximum Aperture by 1 & 2/3rd Stops, Increases Field of View by 0.58x
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