Auf der photokina hat Metabones die 2. Generation ihrer Speedbooster-Adapter mit verbesserter Optik vorgestellt:
http://www.metabones.com/assets/a/stories/...ess_Release.pdf
ZITATPetersburg, VA, USA, Sep 1, 2014: Metabones® and Caldwell Photographic Inc. are pleased to jointly announce the Speed Booster ULTRA series of focal reducing adapters designed for mirrorless cameras with DX-sized sensors, such as Sony E-mount and Fuji X-mount.
The new Speed Boosters use an 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 E-mount and 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.[/quote]
aktiv:
http://www.metabones.com/products/details/MB_SPEF-E-BM2 Canon EF auf Sony E-Bajonett (MB_SPEF-E-BM2)
passiv:
http://www.metabones.com/products/details/MB_SPCY-E-BM2 Contax Yashica auf Sony E-Bajonett (MB_SPCY-E-BM2)
http://www.metabones.com/products/details/MB_SPNFG-E-BM2 Nikon F/G auf Sony E-Bajonett (MB_SPNFG-E-BM2)
Ebenfalls angekündigt für: Canon FD, Minolta MD, Olympus OM, Alpa, Rollei QBM, Contarex, Leica R, Sony A-Bajonett
Viele Grüße,
Matthias
http://www.mi-fo.de/forum/index.php?showto...st&p=303747