|
If I didn't know any better, I'd say that there was a slight focus issue, and some warping of the imaging plane in his images. Compare it to the other Astrograph images from the other 10" manufacturer that he's testing and you'll see that they're sharper, more tightly focused and less elongated.
I'm thinking possible figuring issues with the primary and secondary, with innaccurate (ever so slightly) distances between the 2.
Dave
|