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 … Continue reading Metabones PL to Sony E-mount T CINE Speed Booster ULTRA 0.71x