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]