How Optics Work - the basics of cameras, lenses and telescopes

An introduction to basic concepts in optics: why an optic is required to form an image, basic types of optics, resolution.

Contents:
00:00 - Introduction
01:44 - Pinhole camera
03:28 - Mirror optics
05:06 - Lenses
06:27 - Focus
10:17 - Resolution

Sources:
[1] James Ayscough, A short account of the eye and nature of vision (1755), archived at https://commons.wikimedia.org/....wiki/File:1755_james
[2] https://www.nasa.gov/content/g....oddard/hubble-space-
[3] https://commons.wikimedia.org/....wiki/File:Diagram_of