We've seen some big lenses before, but this Zeiss Apo Sonnar T* 1700mm F4 lens is so big you can't even carry it around in a wheelbarrow. In fact, it weighs 564 pounds, so you'd better have a team of weightlifters to help you point the thing.
It's the largest telephoto lens in the world, well, except for those used by the military which are top-secret and probably 10 times bigger. To get a sense of the scale of the behemoth, in the photo above, that little black rectangle on the end is a Hasselblad camera. And look at the lens in the inset photo, hanging above the crowd. What will they shoot with this thing?
Zeiss Apo Sonnar T* 1700 mm F4 lens [Digital Photography Review]