How Optics Work - the basics of cameras, lenses and telescopes
18:25
How long an interstellar journey will take
17:21
#755 Why is a Camera Lens so Complicated?
13:28
Why lenses can't make perfect images
18:13
Convex and Concave Lenses
11:31
Using a REFLECTOR TELESCOPE for Galaxy Photography!
30:43
Making a monolithic telescope Part 3: Figuring & Testing
14:44
How Does a Camera Work?
29:13