Digitaal analyseren Onnauwkeurig doublet vs triplet telescope Instrueren evenwichtig verkiezing
What specifications do I have to look into when buying a refractor? And would it be possible to use an 80mm refractor on a tracking mount for deep sky objects? (if it
Amazon.com : Sky-Watcher EvoStar 80 APO Doublet Refractor – Compact and Portable Optical Tube for Affordable Astrophotography and Visual Astronomy (S11100) : Refracting Telescopes : Electronics
Sky-Watcher USA Esprit 150mm ED APO Refractor | S11430 – Cloud Break Optics
Doublet vs Triplet APOs - Beginning Deep Sky Imaging - Cloudy Nights