A cheapy Intel Atom processor netbook, used from EBay, will do the trick. Astro apps are usually quite conservative, ThySkyX being one exception - where you image link / astrometry into large star databases.
Autoguiding is never simple. The custom settings within autoguider software really is needed. Stand alone autoguiders do not offer that flexibility. Start out with a QHY5/Orion StarShootAutoguider for trouble free autoguiding.
|