Initial thoughts on my new William Optics Gran Turismo 71
15:39
William Optics Gran Turismo 71 - My impressions after 6 months (review)
17:13
Astro-Tech AT70ED refractor
21:19
Introducing the William Optics GT81iv Refractor Telescope
43:23
4" APO Refractor Shootout
22:24
The 10 Amateur Telescopes That Changed Astronomy FOREVER
11:53
Back-Focus 101: The Petzval Lens ft. William Optics RedCat51
10:47
William Optics Field Rotator Pointer Adjustment - Step by Step
15:57