Metabones Nikon G to Nikon Z-mount Speed Booster ULTRA 0.71x (Black Matt)

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 full-frame 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.

• Nikon F mount lens to Nikon Z-mount APS-C camera (like Nikon Z50, Z fc) ;
• Compatible with both Nikkor G lens &  F lens (include non-AI & AI lens mounts) ;
• Industry's best aperture clickless ring covers an 8-stop range marking, clearly indicating actual number off-stops. No more guesswork. (Patent granted) ;
• Parented 5-element/4-group optical design incorporating ultra-high index tantalum-based optical glass by Caldwell Photographic in the USA ;
• Increase maximum aperture by 1 stop ;
• Increase MTF ;
• Makes lens 0.71x wider ;
• Aluminum Alloy and Brass Construction with Chromium Plating ;
• Rubber gasket protects the Z-mount connection from dust and moisture ;
• Satin Surface Finish ;
• Detachable Arca-Type tripod foot compatible with Arca Swiss, Markins, and Photo Clam ball heads(clamp directly or attach to quick release plate by a 1/4"-20 screw).