K&F Concept Lens Mount Adapter for Hasselblad Mount Lens to Nikon Lens Camera Body HB-AI Allows to use Hasselblad mount Camera Lens to Nikon AI Lens camera. High quality provides great protection and shock absorption for your lenses, water-resistant. 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. Package includes: 1 X Ring Adapter Mount