Metabones SPEF-X-BT1 – Canon EF to Fujifilm X-mount T Speed Booster ULTRA 0.71x

Metabones SPEF-X-BT1 – Canon EF to Fujifilm X-mount T Speed Booster ULTRA 0.71x

Focal reducer for mounting Canon EF lenses on Fujifilm X-mount cameras with phase-detection autofocus. It makes the lens 0.71x wider and adds 1 stop of light, up to f/0.9 output.

Features

• Increases the maximum aperture of the lens by 1 stop, up to f/0.9 output
• Increases the MTF of the attached lens
• Makes the lens 0.71x wider
• Patented 5-element/4-group optical design with ultra-high index tantalum-based glass by Caldwell Photographic (USA)
• Phase-detection autofocus (PDAF) with any AF lens: the adapter translates the optical data between the two mounts
• Lens aperture set from the camera controls
• Image stabilisation (IS) lens support
• Smooth iris with recent Canon (2009+), Tamron SP (2013+) and Sigma (2016+) lenses
• T-stop display with supported cinema lenses on Fujifilm X-H series, X-T2 and newer, X-S10
• Focal length and aperture adjusted in the EXIF data
• Stores EXIF data (lens name, focal length, maximum/minimum aperture) for one manual lens in the adapter
• Parallax correction on X-Pro rangefinders
• LED indicator showing communication status
• Powered by the camera body: no external power needed with most lenses
• Felt-flocked interior to reduce internal reflections
• Rubber gasket protects the X-mount connection from dust and moisture
• Aluminium alloy and brass construction with chrome plating
• Satin surface finish
• Detachable Arca-type tripod foot compatible with Arca Swiss, Markins and Photo Clam ball heads: clamp it directly or fix it to a quick release plate with a 1/4"-20 screw

Note: Each lens must be calibrated on first use following the Metabones procedure. AF+MF and lens aberration correction are not supported; for video, aperture priority or manual exposure is recommended to avoid flicker. AF-C and video AF may not work on some cameras such as the X-T100.

Specifications