William Optics Zenithstar Z61 or Zenithstar Z73? Which one?
19:03
William Optics Zenithstar Z73 Vs The Bright and beautiful M8 : " Lagoon Nebula"
24:13
The WO Zenithstar 73/430 - A good beginner apochromatic refractor?
8:47
William Optics Zenithstar 61 Review [Deutsch/German]
34:57
4 Telescopes Tested: Doublet vs. Triplet vs. Quadruplet vs Quintuplet
5:55
How to set backfocus on the William optics Zenithstar Z61/Z73 (Astrophotography)
5:31
William Optics Z61II Unboxing
20:06
RedCat51 Review - Why I think this is a great telescope
14:12