Quote:
Originally Posted by Atmos
My one single reservation for alt/az systems (requiring a field derotator) is that of accurate flat fielding. With its reported ~9% vignetting across a 100mm imaging circle it may not seem like the biggest of issues but I do have a little OCD for accuracy in scientific measurements. Don't get me wrong, it only means you need a 360º flat field but that does sound like a bit of a PITA 
This telescope has been on my dream list since I first heard about it near two years ago  |
i haven't really thought of that, but most, if not all, large telescopes are alt az mounted these days. i am sure this is not a major issue. you might need the dry ice cleaning system like the Subaru telescope to get rid of those dust bunnies
why not go all out ?