Questions tagged [telescope-making]
The telescope-making tag has no usage guidance.
5 questions
17
votes
5
answers
2k
views
Has anyone ever tried to make a simple telescope using ice?
I grew up with long cold winters, and saw a lot of remarkably transparent ice formed by refreezing meltwater, both in puddles and ponds, and in large icicles. I'd always thought about making optical ...
- 30.7k
9
votes
1
answer
377
views
Why telescope mirror glass shipped as randomly broken chunks of a constant size in cardboard boxes?
The video MIRROR LAB: Preparing for Casting GMT's Mirror 6 shows the unpacking several hundred boxes full of broken glass from OHARA, packed in styrofoam.
The glass chunks are a fairly uniform size of ...
- 30.7k
4
votes
1
answer
425
views
How to make a 65 cm lens with a 20 cm hole in it for a Hamiltonian telescope?
This answer to What (the heck) is a Hamiltonian telescope? Is this one? confirms that the telescope in the question linked there is indeed as described and that the first lens is a full 65 cm aperture ...
- 30.7k
3
votes
1
answer
479
views
Why is this telescope so short? How hard is it to make such a fast primary?
The recently discovered object C/2019 Q4 (Borisov) is in the news because it might have an eccentricity greater than one, which means it might be from outside the solar system, though not necessarily.
...
- 30.7k
7
votes
3
answers
1k
views
Can a material other than glass be used for making telescope mirrors?
Although I do know of a few instances where professional or observatory mirrors have been made by alternate materials, it was primarily for targeting specific nuances, like weight reduction and low ...
- 153