All about refractor telescopes
33:26
5" Refractor Shootout
12:50
The Original Budget Apochromat - Orion's ED80 Refractor!
24:11
The Basics of Astronomy Binoculars
51:26
What's Up? Webcast: Picking a Refractor for Visual
17:47
King of image quality - A deep dive into the refractor telescope design
35:06
Buying Your First Telescope...All You Need To Know.
11:05
What can you see through a $10k telescope?
12:17