This is first light for an Orion 203mm f/4.9 Newtonian I just bought. It's not an expensive scope, and it obviously has some diffraction problems. I trace most of the problems to the mirror clips and the bevel around the mirror, which needs to be blackened or covered. A mirror retaining ring would do the trick nicely. I did attach a FT focuser, electronically controlled. But the scope held collimation and imaged around the sky for five hours with up to 7-minute exposure without a hitch. Seems to be enough to work with here.
This image is 39x180" with the SXVF-H9C. I used the Baader MPCC flattener, which magnifies 1.15x, so this focal length is effectively 1150mm. The image was shrunk to 67% to hide some noise and the funny star shapes caused by the diffraction and perhaps by a mirror that had not settled into the temperature early in the imaging run.