Modification of Astro-Tech 12" RC for Improved Star Images
8:40
I Photographed The Pinwheel Galaxy With A Ritchey-Chrétien Telescope
12:58
The Simplest Way to Collimate a Ritchey Chrétien Telescope
9:41
First Light with the 10” RC Telescope and Observatory Flat Panel (OFP2)
21:16
TS-Optics Ritchey-Chretien Telescopes
50:19
¿El ordenador más estropeado? El Sinclair Spectrum+2 de 1986
18:00
Dentro del Ala Voladora Horten
11:00
2023 RC10 Disassembly, Fan replacement, and Mirror cleaning
30:15