It's a work of art. The magnificently choreographed dance of manufacturing lenses seems like an ancient tradition as old as making swords or soap or something (which I guess isn't surprising because it is glass that they're making). We've seen Nikon produce the glass inside its lenses but this video shows the entire lens making process — you see sand basically become a Nikkor lens. Incredible. [Nikon Imaging via PetaPixel]