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Thanks for the replies, a lot of great information there.
I should of mentioned that the Dobsonian is the 16 inch Skywatcher goto version, missed that part out.
For eye pieces, I have a Tele Vue Delos 10mm and a Tele Vue Powermate 2.5X, then just the standard 20 mm and 10mm eyepieces.
So just to help make sure i a reading and understanding this correctly, So to get better image quality / sharpness from my Donsonian, I could possible make one of these aperture masks?
Plus also look at colour filters?
No advantage in looking at something like the Celestron C11, C9.5 unless i want to take photos?
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