Metabones T Speed Booster Ultra 0.71x II - Canon EF to Sony E

The Metabones T Speed Booster Ultra 0.71x II with Canon EF to Sony E mount has a magnification of 0.71x, and so it effectively reduces the crop factor of mirrorless cameras with DX-sized sensors, such as Sony E-mount cameras, from 1.5x to 1.07x. It features a new optical design including 5-element/4-group incorporating ultra-high index tantalum-based optical glass to achieve extraordinary optical performance with improved corner sharpness, distortion and reduced vignetting.

Specifications: Metabones T Speed Booster Ultra 0.71x II - Canon EF to Sony E

• Model Code: Speed Booster ULTRA
• Magnification: 0.71x
• Crop Factor with DX format camera: 1.07x
• Maximum Output Aperture: f/0.90 (with f/1.2 lens attached)
• Rectilinear Distortion: < 1%
• Lens Elements/Groups: 5/4
• Length Reduction: 4.2 mm
• Camera Mount: Sony E-mount1; Fuji X-mount
• Image Format: DX, APS-C
• Dimensions: 27 x 76 x 72mm for Canon EF version
• Weight: 193 grams
• Tripod Mount: Robust removable type with Arca Swiss compatibility

For a detailed specifications list and further information, visit the Metabones website here.

New optical design - sharper corners, less distortion, reduced vignetting

The new Ultra design makes effective use of exotic materials at the furthest limit of glassmaking technology, and as a result is well corrected for use with virtually all full-frame SLR lenses regardless of exit pupil distance. Thus, the Speed Booster ULTRA performs extremely well with professional-grade f/2.8 zoom lenses such as the 24-70mm f/2.8 and 70-200mm f/2.8 zooms by Canon and Nikon to produce 17-50mm f/2.0 and 50-142mm f/2.0 high-speed zooms, respectively. Similarly, high-speed fixed focal length lenses such as a 50mm f/1.2 will be transformed into a 35.5mm f/0.9 lens with excellent contrast and resolution from the center all the way to the edges of the image.

• 5-element/4-group optical design incorporating ultra-high index tantalum-based optical glass
• If both your lens supports optical image stabilisation (OIS) and your camera supports sensor-shift, in-body image stabilisation (IBIS), the choice is yours on which one to use, or have both of them work in harmony.
• Smooth iris support with the latest Canon (2009+), Tamron (SP series 2013+) and Sigma (2016+) lenses.
• Custom function button (called Focus Hold button) assignable to more than 50 functions, such as Aperture Preview and Eye-AF, on A9, A7 series, A6500 and A6300.
• Dedicated switch controls in-body image stabilization (IBIS) on Sony cameras equipped with SteadyShot INSIDE.
• Compatible with Sony FS7 Mark II camera.
• Cinema EOS lens (CN-E) support, including power zoom, AF and auto iris.
• Rubber gasket protects E-mount connection from dust and moisture.
• Detachable tripod foot, compatible with Arca Swiss, Markins and Photo Clam ball heads.