The T CINE Speed Booster ULTRA 0.71x Adapter from Metabones allows a Canon EF-mount lens to be mounted onto a camera with a FUJIFILM X-mount. The adapter's optics maximize the connected lens's apparent angle of view by a factor of 0.71x while providing a one-stop increase for the camera over the lens's aperture range.

This adapter supports electronic communication between the lens and camera body, so AF, image stabilization, aperture control, and Exif data transfer are supported. If a lens designed for 35mm film or similarly sized full-frame camera sensor is connected to a camera with a smaller sensor, it would project an image larger than the sensor was made to render. Able to capture only the center portion of the projected image, the effective angle of view of the lens would be narrowed, creating an in-camera "crop factor." The T CINE Speed Booster ULTRA 0.71x adapter condenses the light from a lens designed for 35mm film or "full-frame" camera sensors and projects it onto the sensor. This allows the camera's sensor to utilize more of the light gathered by a connected lens, which effectively reduces the crop factor while making available to the sensor an additional one f/stop of light for each of the lens's f/stop settings.

This adapter is constructed from aluminum for durability while minimizing weight, and its mounting rings are made with brass to further prevent wear and tear. The internal optics feature five lens elements in four groups and are designed to provide optical clarity as well as color fidelity. The detachable tripod foot is Arca-type compatible and features 1/4"-20 threads.
NOTE: This adapter does not support EF-S-mount lenses.

Key Features
Allows a Canon EF-mount lens to be used with a FUJIFILM X-mount camera body
Maximizes apparent angle of view of combined camera and lens
Provides a 1-stop increase for the camera over the lens's aperture range
Supports electronic communication
Five lens elements in four groups for optical clarity and color fidelity
Detachable, Arca-type compatible tripod foot with 1/4"-20 threads
Aluminum components for weight reduction
Brass mounting rings prevent wear and tear

Tested Compatible Lenses

-Canon EF 40mm f/2.8 STM
-Canon EF 50mm f/1.2L USM
-Canon EF 50mm f/1.4 USM
-Canon EF 50mm f/1.8 II
-Canon EF 50mm f/1.8 STM
-Canon EF 85mm f/1.2L II USM
-Canon EF 100mm f/2.8 USM Macro
-Canon EF 100mm f/2.8L IS USM Macro
-Canon EF 135mm f/2 L USM
-Canon EF 200mm f/2.8L II USM
-Canon EF 300mm f/2.8L IS II USM
-Canon EF 300mm f/4L IS USM
-Canon EF 400mm f/5.6l
-Canon EF 8-15mm f/4L Fisheye
-Canon EF 16-35mm f/2.8L II USM
-Canon EF 17-35mm f/2.8L USM
-Canon EF 24-70mm f/2.8L II USM
-Canon EF 24-70mm f/2.8L USM Mk1
-Canon EF 24-105mm f/4L IS USM
-Canon EF 28-70mm f/3.5-4.5 II
-Canon EF 28-135mm f/3.5-5.6 IS USM
-Canon EF 28-80mm f/3.5-5.6 III USM
-Canon EF 70-200mm f/2.8L IS II USM
-Canon EF 70-200mm f/4L IS II USM
-Canon EF 70-200mm f/4L USM
-Canon EF 70-300mm f/4-5.6 L IS USM
-Canon EF 100-400mm f/4.5-5.6 L IS II USM
-Canon EF TS-E 17mm f/4L
-Canon EF TS-E 24mm f/3.5L II
-Canon EF-Extender (Teleconverter)
-Sigma 24mm f/2.8 Super Wide II
-Sigma 35mm f/1.4 DG Art 012
-Sigma 50mm f/1.4 DG HSM non art
-Sigma 135mm f/1.8 DG HSM Art 017
-Sigma 24-35mm f/2 Art 015
-Sigma 24-105mm f/4 OS HSM Art 013
-Tamron 45mm f/1.8 VC (F013)
-Tamron 10-24mm f/3.5-4.5 VC HLD (B023)
-Tamron 15-30mm f/2.8 VC (A012)
-Tamron 17-50mm f/2.8 VC (B005)
-Tamron 18-250mm f/3.5-6.3 Di II (A18)
-Tamron 18-270mm f/3.5-6.3 Di II VC (B003)
-Tamron 18-270mm f/3.5-6.3 Di II VC PZD (B008)
-Tamron 24-70mm f/2.8 Di VC USD (A007)
-Tamron 28-300mm f/3.5-6.3 XR Di (A06)
-Tamron 35-150mm f/2.8-4 Di VC OSD (A043)
-Tamron 70-210mm f/4 Di VC USD (A034)
-Tamron 70-300mm f/4-5.6 Di VC USD (A005)
-Tokina 50mm f/1.4 Opera
-Zeiss ZE 18mm f/3.5mm Distagon

specification

Adapter
Camera Mount: FUJIFILM X
Lens Mount: Canon EF
Magnification: 0.71x
Optical Design: 5 Elements in 4 Groups
Electronic Communication: Yes
Display: No
Physical
Material: Aluminum, Brass
Tripod Mounting Thread: 1/4"-20 Female
Packaging Info
Package Weight: 0.9 lb
Box Dimensions: 8.75 x 4.75 x 2.38"