Making a Monolithic Telescope Part 1: Optical Design and Aspherics.
23:59
Making a Monolithic Telescope Part 2: Machining Glass
20:34
How big is a visible photon?
30:43
Making a monolithic telescope Part 3: Figuring & Testing
17:21
#755 Why is a Camera Lens so Complicated?
15:56
Excellent All-Rounder - A deep dive into the Schmidt-Cassegrain telescope design
22:40
How a Lens creates an Image.
1:28:31
Telescope Building with John Dobson
19:42