Great article on how Fuji camera and lenses are made. Lots of photos including the assembly of the new 100-400mm lens.
I was surprised at how much hand assembly of the high end camera and bodies there was. I think I have a better appreciation for the price of some Fuji equipment now
http://www.theverge.com/2016/1/18/10785038/fujifilm-x-pro-2-lens-factory-manufacturing-photos