|
There must be a hundred ways to image DSO's. Keep in mind SCT's and refractors don't need collimation. Refractors are the easiest. No collimation, no mirror flex to worry about. But you don't get much aperture for a refractor compared to a Newtonian.
Newtonians are the best bang for buck. Those 8" F4 astrographs really pack a punch. A great combo for DSLR's. But they need adjustment and mirror flex can be a pest unless you use an OAG.
Fast Newts need a coma corrector, not a problem just factor that in, same as most refractors need a field flattener and/or reducer.
GSO also make RC astrographs, another design to consider.
|