Looking to sell or upgrade your own Metabones Nikon G to E mount Speed Booster ULTRA 0.71x?

MODEL OVERVIEW
Metabones Nikon G to E mount Speed Booster ULTRA 0.71x

The Metabones Nikon G to E mount Speed Booster ULTRA 0.71x has a new 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.