What is Lens? Jon October 27, 2017 21:11 Updated Follow Lens is a browser plug-in that allows users convert altcoins to Bitcoins directly from their browser. Related articles Who is Lens for? What is Shifty? Who is the ShapeShift API for? How does Shifty work? How quickly do you use coins that are deposited? If I exchange BTCs for LTCs, and then exchange LTCs back to BTCs, will I get the same BTCs back?