Metabones Speed Booster ULTRA 0.71x adapter increases aperture by 1 stop to f/0.9, widens lens view, and supports autofocus and image stabilization for Canon EF to RF mount.

Metabones Canon EF to RF-mount T CINE Speed Booster ULTRA 0.71x MB_SPEF-EFR-BT2

Product ID: 53953
€ 649,46 tax incl.

Pre-order. Delivery time from 3 weeks.
SKU: 53953
Model: MB_SPEF-EFR-BT2
Ean: 4897050183113
Condition: New product
Manufacturer: Metabones
649.46
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Type of ProductAdapters for lens
Adapter is for camerasCanon R
Adapter is for lensesCanon EF
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Metabones Canon EF to RF-mount T CINE Speed Booster ULTRA 0.71x MB_SPEF-EFR-BT2

Metabones Canon EF to RF-mount T CINE Speed Booster ULTRA 0.71x MB_SPEF-EFR-BT2

Metabones Speed Booster ULTRA 0.71x adapter increases aperture by 1 stop to f/0.9, widens lens view, and supports autofocus and image stabilization for Canon EF to RF mount.

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Product details

Optical Features

  • Increases maximum aperture by 1 stop, achieving a maximum output aperture of f/0.9.
  • Enhances MTF (Modulation Transfer Function) for improved image detail.
  • Widens the lens field of view by a factor of 0.71x.
  • Incorporates an advanced 5-element/4-group optical design using ultra-high index tantalum-based optical glass developed by Caldwell Photographic in the USA (patent granted).

Electronic Features

  • Supports autofocus with speed optimized for the shorter focal length and brighter aperture.
  • Compatible with Dual-Pixel Autofocus (DPAF) and video autofocus modes.
  • Automatically adjusts focal length and aperture information in EXIF metadata.
  • Supports image stabilization (IS) lenses.
  • Stores EXIF data (lens name, focal length, maximum and minimum aperture) for one manual lens within the adapter.
  • Includes a built-in multi-function Control Wheel (rotatable and push-in) assignable to functions such as ISO, shutter speed, aperture control, or depth-of-field preview.
  • Supports Cinema EOS lenses (e.g., CN-E 18-80mm T4.4 L) on compatible cameras like the EOS C70.
  • Features an LED indicator to display communication status.
  • Powered by the camera body; no external power source required for most lenses.
  • Compatible with cinema cameras including Canon EOS C70 and RED KOMODO 6K.

Mechanical Features

  • Patented positive-lock Canon EF lens mount for secure attachment.
  • Detachable tripod foot compatible with Arca Swiss, Markins, and Photo Clam ball heads.
  • Internal flocking to reduce reflections inside the adapter.
  • Rubber gasket seals the RF mount connection against dust and moisture.
  • Constructed from aluminum alloy and brass with chromium plating for durability.
  • Finished with a satin surface for a professional appearance.
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