Guide to Refractor Optics - Choosing the Best Telescope for You!
43:23
4" APO Refractor Shootout
17:47
King of image quality - A deep dive into the refractor telescope design
33:26
5" Refractor Shootout
19:42
A Telescope for Every Budget
14:28
Eyepiece Upgrade Guide - What you need to know!
51:26
What's Up? Webcast: Picking a Refractor for Visual
34:57
4 Telescopes Tested: Doublet vs. Triplet vs. Quadruplet vs Quintuplet
11:08