When you’re building the world’s largest digital camera, to power one of the world’s most impressive telescopes, you’re going to need to manufacture one of the world’s most incredible lenses. That’s how this massive, 5.1-foot wide optic—the largest high-performance optical lens ever made—came to be. Th 3.2-gigapixel camera being built for the Large Synoptic Survey Telescope (LSST) was thought up over a decade ago. But after getting the green light in 2011, and securing funding in 2015, it was off…