Use popular Nikon F lenses with your FujiFilm X-mount body. Made famous by many professionals in years past, Nikon's pantheon of classic glass would be available for use on your FujiFilm camera.
From the manufacturer:
With this new advanced lens adapter, you can mount Nik Mount Lens on Fujifilm X-mount camera body. There are no electrical contacts in the adapter ring. Exposure and focus must be adjusted manually; autofocus (AF) is not available. With precise design and high technology. Made of brass and aluminum (not plastic); Smooth surface for effortless mount; Anodized aluminum construction. Install, remove and operate lens smoothly. 100% Satisfaction Guaranteed.