Brady and Keith look at the fascinating history of an antique lens in the Royal Society's collection. More links below ↓↓↓ Featuring Royal Society Head Librarian Keith Moore speaking with Brady. Objectivity on Patreon: https://www.patreon.com/objectivity Subscribe to Objectivity: http://bit.ly/Objectivity_Sub Check out some more Objectivity episodes... Big Old Lenses: https://www.youtube.com/watch?v=Qmu1eptEFuU Newton's Principia Manuscript: https://www.youtube.com/watch?v=eZwzE2VFCtI Films by James Hennessy and Brady Haran Royal Society website: http://bit.ly/Royal_Society The Royal Society's own YouTube channel: null Facebook: https://www.facebook.com/ObjectivityVideos Twitter: https://twitter.com/objectivity_vid Patron thank you page: http://www.bradyharanblog.com/objectivity-patrons Objectivity T-Shirts: null