The process of making a camera lens.

[AlanC]

Process X at the Sigma factory.

 

[SimonC]

Sometimes a toothbrush IS the best way to clean delicate parts!

 

[xaviergut]

I just wanted to make a post with the same video

The final product is the Sigma 24-70 f2.8 with the L-Mount!! The worker uses a Sigma Fp or FPL for the image quality control.

Very interesting and relaxing.