Milsurp After Hours

Saw this video on making a camera lens. It takes a lot of engineering, sophisticated machinery, and skilled workers. The video is a bit long...because the process is a bit long just showing the steps as they are made in a modern plant in Japan. The lenses being made are by Sigma, which from my experience with old ones weren't exactly the best...but that was then and this is now and I have no idea how they stack up now days. The end product is a 24-70 2.8 modern lens for digital cameras... I've seen them advertused for Sony and for Canon. The retail prices run from $1050 to $1250 depending on for what model camera.

https://www.youtube.com/watch?v=r5HFLkNrbIU