Metabones MB_SPROLLEI-E-BM2 - ROLLEI QBM to E-mount Speed Booster ULTRA in Black Matt (MBSPROLLEIEBM2) metabones_mb_sprollei-e-bm2 / MB_SPROLLEI-E-BM2. Speed Booster ULTRA for Rollei QBM mount lenses to adapt for use with Sony E-Mount cameras.Sharper corners, less distortion, reduced vignettingNew 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

Compatibility

Metabones Speed Booster adaptor- ROLLEI QBM to E-Mount ULTRA 0.71x (Black Matt) - With Tripod Foot (MB_SPROLLEI-E-BM2)

• 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).
• The tripod foot is detachable and compatible with Arca Swiss, Markins, Photo Clam ball heads.