I had no idea that a set of lenses was such an incredibly complex piece of machinery! Michael Zang acquired on eBay a Leica Tri-Elmar-M 28-35-50mm that had been sliced in half. It was made by students as a graduation project.
Link via Boing Boing | Photo: Duncan Meeder
http://youtu.be/Am5wJUEiNAI