The Tokina TA0011 SZX T-Mount Adapter allows the SZX 400mm Super Telephoto lens to be attached to Nikon F-mount camera bodies. Made of durable lightweight aluminum treated with a scratch-resistant anodized finish, the lens side has M42x0.75" male threads and the body side is outfitted with the Nikon F bayonet lens mount to fit firmly and securely.