This is a custom made lens from Canon that has been produced from 1993 to 2005, the 1200mm Telephoto Lens. It is 84 centimeters long and weighs in at 16 Kgs.

What the hell were they taking pictures of, spacecrafts? This thing is humongous, the price of it is another matter. Canon made 2 or 3 of these a year and they would sell for $99’000, and the used ones are still selling for that price. Either you get two nice cars with this amount of money or a lens that could shoot down planes.

Link: UnCrate