>The DR-3 also screws into the DK-7 adapter, which screws into >the D3/D4/D700 style cameras. I suspect it might have come >with a DK-7 stock?. As such, that RA finder works with all >the cameras. The modern equivalent appears to be the DR-5. > >The "compatible" RA finder for the D600 is the DR-6, >but I am not aware of a gizmo to attach it to the round >D700/D3 style cameras. As such, in this case the >"wrong" RA Finder may be the better long term choice >because one size fits all, with the addition of an adapter or >two.
To attach the DR-6 to a D3, etc, I believe you need a DK-18 and a DK-22. I think it would fit.