The stars in the top corners (Particularly) suggest that the spacing is not quite right. If it were mine I would say the camera needed to move a small amount further away from the scope, but the RASA seems to reverse that. And perhaps a tiny amont of sensor tilt, both of which I reckon the F2 will make it fiendishly touchy about, we could be talking about a fraction of a mm here.
The stars in the corners appear like little arcs is what I am referring to.
|