Fotodiox Lens Mount Adapter for Pentax K to Fuji X-Mount - Compatible with PK SLR Lenses on Fujifilm X Series Cameras - Perfect for Photography, Videography & Travel Shooting

This lens adapter enables the use of NIKON (Nikkor) lenses on the FUJIFILM X-mount series of compact cameras. It works perfectly on my Fuji X-T1.The metal tube seems very solid and machined well. The mount lines up and slides smoothly onto the Fuji body with a reassuring click. Lenses mount as they would on the Nikon body on the receiving end, also very smoothly with no play. There is absolutely no movement or sense of mis-alignment on the copy I have.Focus using the Nikkors seems spot-on across the plane. It does of course extend the lens even farther from the camera and makes most of my Nikkors look ridiculously long and huge on the small Fuji body...but it works, and well. Not sure why the little ring is such a bright blue, its a bit distracting and showy, but OK.Of course, you have to FOCUS MANUALLY, there is no electronic contact with the third-party lenses to the Fuji camera. For newer Nikon lenses (G-type and above) you can set the aperture using the blue ring on the adapter. At far left is wide-open, at far-right is fully stopped-down. Don't know why there are only FOUR CLICKS between wideopen and stopped down fully. You can however move the ring slightly and get in-between these indented stops, but its a bit of a pain, and you don't know what f/stop its on at all. I've noticed the Canon version of this adapter appears to have several more "stops" on this ring--not sure why the Nikon version has so few.You can use your camera in Aperture-Priority mode and let the camera do some of the AE work if you want. Also, you can use older Nikon lenses as well (ones with aperture rings on the lens). I then put the adapter's ring on max (stopped-down) and use the lens' aperture ring to change apertures--works fine, and you then have all the clicks available on the lens. With G-lenses you just have to guess where you have the aperture. I generally just shoot wide open, or stop it down just a tad.I'm pretty happy for the price though. It works, its sharp, and I can use every Nikon glass I own (from 8mm fisheye to 300 f/2.8) on my Fuji body, if I so desire. So far I am happy using a few primes in particular such as my Tamron 90mm Macro, a 50 and 85 f/1.4, Tokina 10-17mm, etc. I'd suggest holding any heavy lens by the lens, and not put too much weight on your Fuji body mount!