This adapter ring is excellent quality (all metal) for the asking price. The processing is very good with very well calibrated processing in the lens mounts; Absolutely no problems with mounting, I even have to say that the first mounting of my Sigma 18-35 f1.8 (Nikon mount) on my Fuji XT2 was extremely hard, then in subsequent uses everything goes back to normal! However, you must be careful that the mounting direction of the ring on the lens side (Nikon mount hence) rotates in the opposite direction to the Fuji mount on the other side, and because of the relative strength of the mount you must be careful to rotate the ring to hold yourself tightly so as not to force the click to lock the bracket on the Fuji body, because by mounting the Nikon lens on the ring already on the body (that is, the opposite direction On the Fuji system) we press on the Mount the body in the direction the ring will be removed so press the safety button to lock the lenses in place AND NOT ON THE END OF THE BODY MOUNT STOP where it wouldn't matter. So be careful not to foolishly damage your body through mishandling... Otherwise, the Micro-Nikkor AF-D 60mm lenses and the Sigma 10-20mm f3.5 and 18-35mm f1.8 work very well on the Fuji XT2. Also note that while the diaphragm adjustment ring on the K&F is precise, the notches in the 6 positions are very (too much?) close together. Also, the apertures obtained are random or rather unknown (so not 2.8 to the exact 4 — we use an X-aperture, which is also different for each lens, albeit reproducible each time). A habit to get used to!