
The video I posted few days ago was on how Nikon produces the glass used in their lenses. There is another video from Nikon Imaging Japan that actually shows how Nikkor lenses are assembled:

Nikon Imaging Japan published a new video on how Nikkor glass is made. The video was shot at an optical glass manufacturing plant with the Nikon D800 camera:

A quick update: Nikon USA removed the sentence from their support page where they suggested not to breathe on your lens to clean it because the lens coating could be damage. I guess it is now safe to continue to clean your lens by “fogging” it.