Restored to Life adapts not only the DG-2 magnifier
...but adapts the DR-3 and DR-4 right angle viewers to my Nikon d810. Yes it is plastic which I consider a plus. So far it is the only adaptor out there. I am very happy that it is made of plastic, it it were metal one runs a risk of cross threading the camera's viewfinder. Better that I would cross thread the adaptor than send the camera in for repair. Nikon's DR-5 right angle viewfinder is around 200 US bucks, i.e. dollars, the DR-3 and DR-4 are considerably less costly and as far as I am concerned do as well as the DR-5. The little do-dad that comes with is for tightning the adaptor to the camers, but in my experience finger tight seem to do as well.