[E. von Hoegh]

I agree that the Nikon's image circle wouldn't be big enough to cover. I think you need something from a larger camera. Maybe a 65mm Angulon from a Linhof 23 would work, then see if you can adapt it. As with converting a 120Pan Holga you would mount the lens onto an M42 metal body cap, then mount that on a M42-M42 12-17mm focusing helicoid, then mount that onto something like an M42 to Nikon (because of the small bayonet flange) adapter that is screwed onto the modified Holga body.

Steve

Why not just buy a real camera, instead of all that rigamarole? You still won't know where it's focussed.