Metabones Canon EF to E-mount T Speed Booster ULTRA 0.71x

Canon EF Lens to Sony E Mount T Speed Booster ULTRA 0.71x

New optical design: advanced 5-element/4-group optical design incorporating ultra-high index tanatalum-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.

Optical/Mechanical:

• Increase maximum aperture by 1 stop
• Increase MTF
• Makes lens 0.71x wider
• Advanced 5-element/4-group optical design incorporating ultra-high index tanatalum-based optical glass by Caldwell Photographic in the USA (patent pending)
• Felt material flocked inside the opening to reduce internal reflection
• The tripod foot is detachable and compatible with Arca Swiss, Markins, Photo cam ball heads

Electronic:

• Phase-detect autofocus support on A7RII and A7II.
• Supports 5-axis in-body image stabilization of A7II and A7RII.
• Powered by camera body. No external power source required.
• Aperture control from camera body.
• Wide open button (opposite of depth-of-field preview function) makes manual focusing easy and assignable to a custom function on A7 series.
• High performance 32-bit processor and 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, zoom range)
• Distance and zoom display on VG and FS series camcorders (lens with distance information support required).
• Auto magnify (lens with distance information support required)
• Auto "APS-C Size Capture" on full-frame cameras.