This rare 1970s Fisheye Lens, it’s believed to be the most extreme wide angle optic ever produced. Officially called the Fisheye-Nikkor 6mm f/2.8, this lens has been first shown to the public at the Photokina trade show in Cologne, Germany in 1970. It weighs a whopping 5.2kg, is 171mm long and has a diameter of 236mm, and boasts a field of view of 220º ; it can literally see behind [...]