Metabones Canon EF Lens to Sony E Mount T Speed Booster ULTRA 0.71x - EOS to A7II A7RII A7SII A6500 A6300

Speed Booster ULTRA for E-Mount and X-mount cameras

Sharper corners, less distortion, reduced vignetting

New optical design: advanced 5-element/4-group optical design incorporating ultra-high index tantalum-based optical glass to achieve extraordinary optical performance with improved corner sharpness, distortion and reduced vignetting.

Like the revolutionary original Metabones Speed Booster announced in January 2013, the Speed Booster ULTRA 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 and Fuji X-mount cameras, from 1.5x to 1.07x. However, the new ULTRA design makes very effective use of exotic materials at the furthest limit of glassmaking technology, and as a result is well corrected for use with virtually all fullframe 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.

Metabones Exclusive

Advanced 5-element/4-group optical design incorporating ultra-high index tantalum-based optical glass by Caldwell Photographic in the USA (patent pending).
If both your lens supports optical image stabilization (OIS) and your camera supports sensor-shift, in-body image stabilization (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.
Cinema EOS lens (CN-E) support, including power zoom, AF and auto iris.
Detachable tripod foot, compatible with Arca Swiss, Markins and Photo Clam ball heads.
Optical/Mechanical

Increase maximum aperture by 1 stop.
Increase MTF.
Makes lens 0.71x wider.
Felt material flocked inside to reduce internal reflection.
Electronic

AF-C tracking during high speed drive at up to 10fps on Sony A9. (NOT applicable to A7R Mark III or A7 Mark III, refer to footnote number [x] of Sony's A7 Mark III press release for limitations.)
Fast contrast-detection AF on all E-mount cameras (except AF-S/DMF with Sony A9).
Pure phase-detection autofocus support on A9, A7RII, A7II, A6500 and A6300 (the fastest).
Supports 5-axis in-body image stabilization of A7II, A7RII and A7SII. (Distance information from lens required; 3-axis IBIS if lens does not transmit distance information.)
Powered by camera body. No external power source required.
Efficient switched-mode power supply.
Supports image stabilization (IS) lenses.
Supports electronic manual focusing (e.g. EF 85/1.2L II and discontinued EF 50/1.0L)
EXIF support (focal length, aperture, lens name)
Distance and zoom display on VG and FS series camcorders, A9, A7 series, A6500 and A6300 (lens with distance information support required).
Auto magnify (lens with distance information support required)
Auto "APS-C Size Capture" on full-frame cameras.

Please refer:
https://metabones.com/products/details/MB_SPEF-E-BT2