Focal Length vs. Focal Ratio: What They Do Conceptually! #astronomy #science #telescope
13:12
Just How Good is the Antlia 3nm Oxygen III NB Filter? Antlia 3nm vs. ZWO 7nm #astronomy #astro
14:23
More Fast Focal Ratio Mythconceptions
16:01
Telescopes: Focal Ratio and Plane, plus Telescope Types
13:37
Keep Track of ADU Values When Imaging! #astro #astronomy #astrophotography
19:26
Comment fonctionnait la machine Enigma ?
27:55
J'ai construit un vélo à billes omnidirectionnel
13:34
How Does Focal Length Change What Size Pixels a Camera Sensor Needs?
20:17