|
Mike,
large dobs on servo cat and argo navis can work for both DSO and Planetary. Yes a derotator is necessary for DSO work. The drives are really accurate in the SDM with servo cat, so much so that with a bit of counter weight work I could image Jupiter at 11000mm +. Thermal dynamics can be gotten around by making a cooling system. Something around 6-8 peltiers would be right for this size scope. You might also want to hand guide it rather than try to use software. But two minutes or so is nothing for guiding.
The advantages for this size scope are really obvious I reckon. DSO images can be done with very short subs and a derotator. In 90 seconds you are going to get heaps of detail. With planetary you can get great detail and huge image scale. The resolving power of a large scope will always be better than a smaller scope. Cats eye collimation kits are very useful for this type of scope. Go for a 1/30 wave+ mirror too. The better the resolution the tighter the stars and the more wow you are gonna get. A mirror like this might cost 8 grand, but worth it all the way.
I fully support your ideas. Dare to be different.
|