The Lord of the Rings might have ended differently if Sauron had one of these... Heralded as the world’s most “extreme wide-angle” lens, the Nikkor 6mm f/2.8 Fisheye Lens was first produced in 1970 at the Photokina trade show in Cologne, France.

The lens officially went into production in 1972 and uses 12 glass elements in nine groups. But you don't have to step into a time machine to get your hands on this piece of camera history; available via Grays of Westminster for £100,000 GBP (approximately $161,400 USD!)