William Optics Zenithstar Z73 Vs The Bright and beautiful M8 : " Lagoon Nebula"
23:56
Trying Out 47-Megapixel Mode on the ASI 294MM Pro: I was surprised 😱📷
31:01
First Light with my Sky Watcher HEQ5 Pro and WO Zenithstar 73/430!
34:57
4 Telescopes Tested: Doublet vs. Triplet vs. Quadruplet vs Quintuplet
21:21
Apertura Carbonstar 150, "Defeating my Newtonian Dew Issues and Optical Reliability"
10:29
Clear Skies Finally, Shooting with the Zenithstar Z61/73 (Astrophotography)
8:47
William Optics Zenithstar 61 Review [Deutsch/German]
51:26
What's Up? Webcast: Picking a Refractor for Visual
8:22