16:06
Collimating Ritchey Chretien Telescopes with the TSCOLLIT
12:58
The Simplest Way to Collimate a Ritchey Chrétien Telescope
15:47
Binoviewers Make The Moon Exciting Again - Models Reviewed & Questions Answered ( by #reflactor )
20:01
TS-Optics ToupTek Cameras for Astrophotography
8:33
Raus aus dem Pott - Astrofotografie unter einem dunklen Landhimmel
4:49
Warning about GSO Ritchey-Chretien's Baffling ( RC resold under Orion, TS-Optics, .. )
13:52
Sharpstar ASKAR 120 APO First Impressions
29:08