3 ms·
People rarely make telescope mirrors of this size at home, it just takes way, way too long. As mirror radius increases the amount of material you have to (very
by reportingsjr 6y ago
People rarely make telescope mirrors of this size at home, it just takes way, way too long. As mirror radius increases the amount of material you have to (very slowly) grows in a cubic fashion, so a 14.7" mirror requires removing over 8 times as much as a 7" mirror. It takes too long to do this by hand to be reasonable for most people.
- TwoBit 6y agoGiven that all commercial mirrors are made by machines and computers, why not the same at home?
- AstralStorm 6y agoThe jig to do it is somewhat expensive it and hard to put together. The especially hard part is getting the lens to not vibrate at higher speeds, which is probably done by using pneumatic or hydraulic drive or very strong magnetic drive. And if the thing goes off, you could have tens of kilos of broken glass flying in all directions.