I just scored a Tokina ATX 400mm f5.6.
The AF version for Nikon.
I had often wanted one but never enough to buy one.
Well i should have bought one years ago. it appears to be a very well made lens and looks contrasty in the viewfinder. its much smaller than I expected and easy to handhold, not that I would want to.
The AF is internal and quick enough for me.
I will have to report back after I run some film through it.