The Metabones Speed Booster Ultra is a lens mount adapter that transforms your Nikon G-mount lenses for use on Micro Four Thirds cameras. With its 0.71x reduction factor, this adapter not only changes the lens mount but also effectively reduces the focal length and increases the effective aperture by approximately one stop, giving you faster glass and a wider field of view. Precision engineered optics ensure minimal optical degradation whilst maintaining autofocus compatibility where supported by your camera body. An essential tool for photographers looking to maximise their existing Nikon lens collection on MFT systems.