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Metabones announces the new Speedbooster ultra!

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The new Speedbooster Ultra does everything the original first generation Speedbooster did…but it does it better! It has an 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.

You can preorder them now at BHphoto:

Metabones Canon EF-Emount Speed Booster Ultra-Black Matt (Click here).
Metabones QBM-Emount Speed Booster Ultra-Black Matt (Click here).
Metabones Contarex-Emount Speed Booster Ultra-Black Matt (Click here).
Metabones OM-Emount Speed Booster Ultra-Black Matt (Click here).
Metabones MD-Emount Speed Booster Ultra -Black Matt (Click here).
Metabones FD-Emount Speed Booster Ultra-Black Matt (Click here).
Metabones Alpha-Emount Speed Booster Ultra-Black Matt (Click here).
Metabones Alpa-Emount Speed Booster Ultra -Black Matt (Click here).
Metabones Nikon G-Emount Speed Booster Ultra-Black Matt (Click here).
Metabones Leica R-Emount Speed Booster Ultra-Black Matt (Click here).

 

This is the official press text from Metabones:

Sharper corners, less distortion, 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. (More information can be found in the press release here)

Key Features
  • 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).
  • Electronic integration of aperture diaphragm, controlled by or from the camera body.
  • Partial autofocus support for late-model (post-2006) Canon-brand lenses.
  • Powered by camera body. No external power source required.
  • High performance 32-bit processor and efficient switched-mode power supply.
  • The tripod foot is detachable and compatible with Arca Swiss, Markins, Photo Clam ball heads.
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