There is also a 90 minutes film »Telescope building with John Dobson« [1], inventor of the Dobsonian telescope [2], going through the entire process of building

There is also a 90 minutes film »Telescope building with John Dobson« [1], inventor of the Dobsonian telescope [2], going through the entire process of building a 16" telescope from scratch. [1] https://www.youtube.com/watch?v=snz7JJlSZvw https://www.youtube.com/watch?v=snz7JJlSZvw [2] https://en.wikipedia.org/wiki/Dobsonian_telescope https://en.wikipedia.org/wiki/Dobsonian_telescope