Dobsonian Showdown: StellaLyra 8″ f/6 vs Apertura AD8 vs Orion SkyQuest XT8
All three models are 8″ f/6 Newtonian Dobsonians with ~1200 mm focal length and a 203 mm parabolic primary. StellaLyra 8″ f/6 and Apertura AD8 use enhanced aluminum coatings with ~93% reflectivity