I agree Rob. Something seriously wrong with that scope. However. nothing is moving inside the scope as it is static and it performs like this. This tells me that somewhere along the line all scopes by the mere fact that we are working with lenses will refract the light off the centre line to a degree if the conditions are right. So what I am saying is that this may happen in all scopes. Some more than others. This one obviously sitting at the extreme.
There are only two things infinite: The stupidity of man and the universe. And I am not sure about the latter. - AE