10.5mm Nikon
What is the difference between 10.5mm and 16mm Nikon lens?
AFS Nikon 10.5mm lens is a DX format lens, and can only be used for DSLR Nikon DX-format Nikon AFD lens is a 16mm FX-format and can be used for both DX and FX-format digital SLR. In this case means FX Full Frame, similar the size of the film. Both the camera are fish eye camera, but if 16 mm is used in a DX DSLR will not have the fisheye effect. To fisheye effect, you must use the AFS Nikon 10.5mm.
Nikon 10.5mm f2.8 Fish eye DSLR lens Review (dombower)