Celestron SCT Back Focus Study at Native and Reduced Focal Lengths
18:11
Backfocus on the EdgeHD 8 using an OAG
24:17
ZWO OAG Introduction
23:44
What is BACKFOCUS?? And how to deal with it? - Starting Astrophoto for Lazy People - Ep 8
25:19
Setting Back Focus for Astrophotography with Celestron NextStar 6SE 8SE and f6.3 Focal Reducer
8:10
Backfocus with an ZWO Cooled Camera
14:34
Back-Focus 101: Celestron 8" EdgeHD SCT (no reducer)
20:30
Planetary Imaging - Seeing or Focus?
8:18