Check out the adaptors at this following link.

The big factor will be your camera.

I do not know the Nikon D1 but if you wish to try it get one of these adaptors.

I have not received mine yet, but have been told they are the only way to go.

Scopetronix digi T system at
http://www.scopetronix.com They have adapters for $89.95 but you'll
need to add an eyepiece to that cost.