Metabones Contax/Yashica CY Lens to L-Mount CINE Speed Booster ULTRA 0.71x

The Contax/Yashica CY Lens to L-Mount CINE Speed Booster ULTRA 0.71x from Metabones uses an advanced five-element in four-groups optical design, incorporating ultra-high index tantalum-based optical glass to achieve optical performance with improved corner sharpness, less distortion, and reduced vignetting. The Speed Booster ULTRA has a magnification of 0.71x and is well corrected for use with virtually all full-frame zoom and prime lenses regardless of exit pupil distance.