Back-Focus 101: Celestron EdgeHD: C9.25, C11, and C14 Advanced Back-Focus with the Celestron OAG
11:53
Back-Focus 101: The Petzval Lens ft. William Optics RedCat51
12:23
Back-Focus 101: Celestron EdgeHD: C9.25, C11, and C14 Basic Back-Focus for DSLR and CCD/CMOS Cameras
18:45
Telescope Back Focus: The Ultimate Guide [TAIC Short]
23:53
Setting Up An Off-Axis Guider
14:34
Back-Focus 101: Celestron 8" EdgeHD SCT (no reducer)
9:17
Off Axis Guider, OAG setup Astrophotography
14:14
ZWO EAF Installation for Standard Celestron SCT and RASA 8 Focusers
18:31