Here’s an interesting “How It’s Made” segment showing how optical lenses are made. Here’s a hint at why lenses are so expensive: slabs of optical glass cost up to $1000 for 2.2lb!
I was literally JUST wondering about this the other day thinking the discovery channel should do a “how it’s made” about it!
it’s also here, a bit faster:
I saw something similar the other day from the Canon site. Here’s their museum with the process of making a lens.
http://www.canon.com/camera-museum/tech/l_plant/main.html Very cool videos.
This is really cool