And you thought yours was big... Dan Slater has gone to the complete extreme, testing telescopic lenses from a Celestron 300mm through to a Russian made 1000mm lens and the amazing Perkin Elmer 4572mm f11 missile tracking lens coupled with a Nikon TC301 x2 teleconverter giving a HUGE 9144mm... You just have to see his pictures to believe what you're seeing.

Nikon D1, 300mm Celestron Lens Nikon D1, 4572mm Perkin Elmer Missile Tracking Lens + Nikon TC301 x2 teleconverter (9144mm, f22)

Click here for Dan Slater's big big big lens page