4 ms·

Yeah idk. Lenses are hard.

• samatman 5y ago
  It's not the lenses which are difficult, it's clear glass. With a piece of pure glass, the rest is some emory and a great deal of patience. Clear glass is also more about knowhow than raw technical difficulty, it isn't the Bessemer process, it's knowing how to flux with soda + add some lead to get the melting point down, then pouring it on lead to get nice flat sheets.
  • ch4s3 5y ago
    It’s not like you’d be distracted by Twitter, just knowing how it works you could probably work it out with a few skilled glass makers.