More Fast Focal Ratio Mythconceptions
11:43
Understanding Focal Length: Trading Speed for Detail
8:08
Astro Tutorial #1.6: THE F-RATIO "fast" vs "slow" scopes
18:14
What Makes Trolls & Gatekeepers Tick, And Why They Don't Matter
11:45
Taking Pictures of Stars at 2000mm Focal Length.
14:46
How to Tell If Your Image Needs More Integration Time
23:22
What *is* a photon?
21:47
How to Reveal the Blazing Cores of Globular Clusters
21:34