12:50
Vintage telescope masterclass - Hand-held telescopes (Part 1)
Astronomy and Nature TV
9:08
Vintage telescope masterclass - Hand-held telescopes (Part 2)
14:30
Vintage telescope masterclass - Hand held telescopes (Part 3)
44:26
The manufacture of high-precision brass telescope tubes 1780 to 1990
3:52
The telescope that launched the space age, and changed the world
