Watch this before you buy Celestron 8SE SCT, or a Focal Reducer or a Hyperstar
19:10
Focal Reducers - Complete Overview and Function
29:50
Absolutely Everything You Need to Know about Astronomical Eyepieces & Visual Observing
11:08
What is the difference between Barlows, Focal Extenders and Focal Reducers?
53:42
Designing and Building a Low Cost Dew Heater System
12:55
Choisir son télescope quand on débute dans l'astronomie
16:19
What telescope should I buy?
12:05
Backfocus
20:07