Well here it is.
Nikon ED82A scope with FSA-L1 adaptor. The scope is naturally quite tail heavy so adding the camera then pointing it all skywards makes it worse. As the moon is moving, the camera body is only resting on the ballhead plate. Even though it is quite hefty, the 501 head gives a bit much twang with this angle of operation.
The riflescope gives a 4x dead on finder as it has fine cross hairs.
Don