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Metabones Canon EF Lens to Micro Four Thirds Camera T Speed Booster ULTRA

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Rental Price: $61.00
Retail: $649.00
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The Metabones Canon EF Lens to Micro Four Thirds Camera T Speed Booster ULTRA allows you to pair Canon EF mount lenses with Micro Four Thirds cameras and 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 Micro Four Thirds size.

The Speed Booster works by shrinking the image circle of your Canon EF lens down to better fit the smaller sensor of Micro Four Thirds cameras. This has the effect of making the field of view of the lens 0.71x wider or, in other terms, reducing the crop factor of the camera from 2x to 1.4x. For example, your Canon 40mm f/2.8 STM lens becomes an effective 56mm with this Speed Booster on a Micro Four Thirds camera instead of the 80mm effective view you'd have with a straight adapter. This is closer to the APS-C view of 64mm for this particular lens example. Your Micro Four Thirds camera will render less like a Micro Four Thirds 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 and image stabilization. Metabones has designed particularly good AF support for Panasonic Micro Four Thirds cameras, such as the GH5, making this adapter a boon for GH series shooters wanting to use EF mount lenses. That said, Panasonic's video AF will always carry a risk of hunting longer with an adapter, including this one, versus the performance seen in native Panasonic lenses.

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. This Speed Booster is powered by the camera body or with optional 5V external power. Both the camera end and the lens end of this adapter are made of brass that are precision-machined and plated with chromium. It has a satin surface finish to match most MFT bodies and EF lens finishes. The Metabones Canon EF Lens to Micro Four Thirds Camera T Speed Booster ULTRA is a great tool for those using Micro Four Thirds cameras 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.

For an interesting White Paper on how the Micro Four Thirds Speed Booster system works, please click here.

  • • Front Cap
  • • Rear Cap
  • • Detachable Tripod Foot
  • • This Speed Booster is compatible only with EF mount lenses and not Canon EF-S mount lenses. Non-Canon EF mount lenses in crop frame format, such as the Sigma 18-35mm f/1.8, will mount to this adapter but may experience vignetting. Experiment at your own risk.
  • • 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.
  • • 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 except on the Olympus OM-D E-M1. You may also see excessive hunting with Tamron lenses.
  • • There is no support for Focus Stacking or Focus Bracketing with your Olympus when paired with this Speed Booster.
  • • 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).
  • • 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 EF 8-15mm f/4L Fisheye
  • Canon CN-E 18-80mm T4.4L IS KAS S (Requires External Power for AF)
  • Canon EF 20-35mm f/3.5-4.5
  • Canon EF 24-105mm f/4L IS
  • 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
  • Canon EF 50mm f/1.4
  • Canon EF 50mm f/1.8 STM
  • Canon EF 70-200mm f/2.8L IS II
  • Canon EF 70-300mm f/4-5.6L IS
  • Canon EF 85mm f/1.2L II
  • Canon EF 100mm f/2.8L IS Macro
  • Canon EF 100mm f/2.8 Macro
  • Canon EF 100-400mm f/4.5-5.6L IS
  • Canon EF 100-400mm f/4.5-5.6L IS II
  • 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

    The following have been tested by Metabones community members and then sanctioned by Metabones. This list will expand over time. Please visit Metabones' website for the most recent results:

  • Canon EF 70-200mm f/2.8L IS
  • Canon EF 85mm f/1.2L
  • Canon EF 200mm f/2L IS
  • Canon EF 300mm f/2.8L IS
  • Canon EF 400 f/2.8L IS
  • • Increases Maximum Aperture by Approximately 1 Stop and Reduces Sensor Crop Factor from 2x to 1.4x (Increases Field of View by 0.71x)
  • • Retains Electronic Communication Between Lens and Camera
  • • Powered by Camera Body or External 5V Source
  • • Retains Autofocus (See Notes for More)
  • • Allows Aperture Control with Your Camera
  • • Lens-Based and Camera-Based Image Stabilization Supported
  • There is no manual for this product.
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