DIY: How to make a Sun filter for telescope
17:20
The 3 Filters used in Solar Observing and Imaging
13:09
How to Make a Solar Filter for Telescope or Camera
9:56
Create your own solar filter hat for a telescope for less than $12
5:21
NEW Safe, Strong and Easy to do SOLAR FILTER For Telescope
15:18
How to make an Astronomical Solar Filter Part 1
13:49
How to Build a Radio Telescope (See Satellites 35,000km Away!)
13:06
HUGE Magnet VS Copper Sphere - Defying Gravity- Will a Neodymium Magnet Float Inside?
9:42