Metabones Canon EF Lens to Fujifilm X T CINE Speed Booster ULTRA 0.71x Adapter

SKU: MBSPEFXBT3 MFR: MB_SPEF-X-BT3
Earn VIP Reward Points

Key Features

  • Maximize your Fujifilm X camera with Canon EF lenses using this adapter.
  • Boost aperture by 1 stop with this 0.71x Metabones speed booster adapter.
  • Maintain superb image quality with advanced optics for sharp, clear shots.
  • Crafted from durable aluminum alloy & brass for reliable, long-term use.
  • Enjoy secure lens attachment with the precision Canon EF lens mount.
  • Get creative; adapt Canon EF lenses to Fujifilm X mount for unique photos.
See More Product Details
Special Order?Estimated to Ship: 08/16/2025
Free Shipping

See Options

1

Protect your gear with Adorama Protect.* Learn more

2 Year

$69.99

3 Year

$94.99

4 Year

$119.99

Available to U.S. customers only.

Need help? Ask our experts.

Overview
Compare
Specs
Protection
Q&A

Questions & Answers

Reviews about this item

Review Summary

Select a plan in the Add Protection section above and purchase with this product by clicking “Add to Cart”.

image-protection

TRUSTED PROTECTION PLANS, EXCEPTIONAL SERVICE.

Invest In Your Gear and Peace Of Mind!

Accidents happen. Protect your favorite Adorama products and purchase a protection plan to stay covered from accidental damage, mechanical or electrical failures, and more.

Repair or Replacement

Repair or Replacement

If we can’t fix it, we’ll replace it at no additional cost.

Accidental Damage

Accidental Damage

Protect your product from drops, spills, and more.

Peace of Mind

Peace of Mind

Enjoy your gear without fear. We have you covered!

Failure Protection

Failure Protection

When regular use of your product over time results in mechanical or electrical failure.

Zero Deductible

Zero Deductible

We will never charge you a deductible after the purchase of a plan.

Customer-Focused Support

Customer-Focused Support

Our claims process is simple & easy and our customer service team is happy to help.

Adorama Protect powered by Extend is available for purchase to customers in the United States. Not available for international or U.S. territories purchases. Plans on open box items do not cover pre-existing damage.
Adorama Protect plans are available for ABS clients. If you have any questions or require assistanse, please call 800-223-2500

Metabones Canon EF Lens to Fujifilm X T CINE Speed Booster ULTRA 0.71x Adapter Specifications

  • Material

    Aluminum Alloy, Brass

  • Magnification

    0.71x

  • Camera Mount

    Fujifilm X

  • Lens Mount

    Canon EF

  • Tripod Mounting Thread

    1/4"-20 Female

  • UPC Code

    4897050183267

Models
Metabones Canon EF Lens to Fujifilm X T CINE Speed Booster ULTRA 0.71x Adapter
$699.00

Special Order

Generally ships in 7-14 days, subject to availability

Wooden Camera Fujifilm X Mount to PL Mount Adapter (Pro)
$499.00

Ships from Manufacturer

Usually ships within 2-4 Days. Please note: Your card will be charged when order is submitted to the vendor (usually within 24 hours).

FeaturesElectronic AdapterBasic AdapterBasic Adapter
StyleWith Control Ring--
Camera Fitting (Male)Fujifilm XFujifilm XFujifilm X
Lens Fitting (Female)Canon EFContarex BayonetPL Mount

About Metabones Canon EF Lens to Fujifilm X T CINE Speed Booster ULTRA 0.71x Adapter

Under the hood of the Metabones Canon EF Lens to Fujifilm X T CINE Speed Booster ULTRA 0.71x Adapter lies an advanced optical design that sets a new standard for lens adapters. Featuring a sophisticated 5-element/4-group optical construction, this adapter utilizes ultra-high index tantalum-based optical glass to deliver exceptional optical performance. This results in sharper corners, minimized distortion, and reduced vignetting, ensuring your images maintain high quality from edge to edge.

The Speed Booster ULTRA boasts a magnification factor of 0.71x, effectively reducing the crop factor of mirrorless cameras with APS-C sensors, such as those with Sony E-mount and Fuji X-mount, from 1.5x to a more expansive 1.07x. This innovative design leverages cutting-edge materials, allowing it to be compatible with virtually all full-frame SLR lenses, regardless of exit pupil distance. As a result, it excels with professional-grade f/2.8 zoom lenses, transforming a 24-70mm f/2.8 into a 17-50mm f/2.0 and a 70-200mm f/2.8 into a 50-142mm f/2.0, delivering high-speed performance. Fixed focal length lenses, like a 50mm f/1.2, are converted into a 35.5mm f/0.9 lens, offering superb contrast and resolution across the entire image.

Optically, the adapter increases the maximum aperture by one stop, reaching an impressive f/0.9, and enhances the Modulation Transfer Function (MTF), making lenses 0.71x wider. Developed by Caldwell Photographic in the USA, this patented design ensures top-tier performance.

Electronically, the adapter facilitates seamless communication between Canon EF mount lenses and Fujifilm X-mount cameras. It supports phase-detection autofocus (PDAF) across a wide range of lenses by translating essential metadata between lens interfaces. The lens iris/aperture is controlled directly from the camera body, and the adapter is compatible with Fujifilm XF Teleconverters. It also supports optical image stabilization (IS) and smooth iris transitions with the latest Canon, Tamron, and Sigma lenses. Additionally, it adjusts focal length and aperture in EXIF data and can store EXIF information for one manual lens. Parallax correction is supported on X-Pro series rangefinders, and an LED indicator provides communication status. The adapter is powered by the camera body, eliminating the need for an external power source with most lenses.

Mechanically, the adapter features a patented positive-lock EF lens mount, flocking to reduce internal reflections, and a rubber gasket to protect the X-mount connection from dust and moisture. Constructed from aluminum alloy and brass with chromium plating, it boasts a satin surface finish. The detachable tripod foot is compatible with Arca Swiss Style ball heads and can be attached to a quick release plate via a 1/4"-20 screw, offering versatility and stability for professional use.

Metabones Canon EF Lens to Fujifilm X T CINE Speed Booster ULTRA 0.71x Adapter Features

  • Advanced 5-element design with ultra-high index glass for exceptional optical performance
  • Increase maximum aperture by 1 stop, up to f/0.9, for improved low-light capabilities
  • 0.71x magnification reduces crop factor from 1.5x to 1.07x on APS-C cameras
  • Supports autofocus, image stabilization, and metadata transfer for a wide range of lenses

Warranty Information

This product has a limited warranty of 12 months.

Key Features

  • Maximize your Fujifilm X camera with Canon EF lenses using this adapter.
  • Boost aperture by 1 stop with this 0.71x Metabones speed booster adapter.
  • Maintain superb image quality with advanced optics for sharp, clear shots.
  • Crafted from durable aluminum alloy & brass for reliable, long-term use.
  • Enjoy secure lens attachment with the precision Canon EF lens mount.
  • Get creative; adapt Canon EF lenses to Fujifilm X mount for unique photos.

What's in the box:

  • Metabones Canon EF Lens to Fujifilm X T CINE Speed Booster ULTRA 0.71x Adapter
  • Front Cap
  • Rear Cap
  • Metabones 1 Year Limited Warranty