I've got my eye on a 12" dob and would like someone to tell me if my thinking is sensible or if they have any better ideas!
The background is that I live just outside of York, so 54 degrees north in a bortle 4 area. I'd like a scope purely for observation of DSOs but can also do some planetary. It'll be put away every night and regularly put in the car to get outside of my village, which isn't far but a necessary trip none the less.
I'm thinking a 12" flex tube dob is the best combination of cost, aperture, portability & storage based on an overall budget of £3k. The ES option seems to be better for my needs than what SW offer. I'm also thinking that I can go mad and get a 21mm Ethos to maximise glass quality and get that FOV, using 2x and 4x 2" powermates in place of other EPs. I'd get a ND filter for use on the moon, but what others should I get?
Is this a sensible approach? Are there any other approached I should consider? What other gear will I need? I'm thinking I'll need a laser collimator and a self-built levelling platform (for when I'm out & about). Will I need (or disappointed if I don't get) a coma corrector, and if I do is ES' own a sensible option or should I stump up a bit more for a paracorr, or is that just burning money?
One last question, can I use a 90 degree diagonal with a dob to make looking near the horizon easier?
cheers