K&F Concept Camera Lens Adapter Ring for Nikon G AF-S Mount Lens to Fujifilm Fuji FX X-Pro1 X-M1 X-A1 X-E1 Adapter This adapter fits all Nikon F mount (including DX format, G in ending) lens, to Fujifilm Fuji FX X-Pro1 X-M1 X-A1 X-E1 interchangeable lens digital camera. Smooth surface for effortless mount,Infinity focus allowed. Made of brass and aluminum (not plastic), anodized aluminum construction. Please note: If you want to use nikon AI lens on this Nikon(G) adapter ring, it could be attached, but the aperture control ring could not be usedas there is a pin on Nikon(G) lens that could move the aperture control ring but no on AI lens.Tripod mount on adapter to balance heavy medium format lenses Please note: Infinity focus positionthe position of the infinity mark of the telephoto lens or super telephoto lens is shifted slightly to the positive side to enable focus adjustment even when focus shift is caused due to temperature changes.The shift range is denoted by an L-shaped line, Be sure to check the focus through the viewfinder even when you shoot at infinity.