I doubt that it would be purchased for practical photography. With only like 30 made it would be a collectors item. And really, the price isn't all that bad, $13000 wouldn't get you a 300 f/2. But as you pointed out there are far more practical and better ways to get to 1200mm.I wonder how is the IQ on (from) that thing?
Would it be cheaper to put D700 on a telescope or TC-20 on some 600mm lens?
It would look somethind like this:
Although, I would not want to wear a beard and some rug top near this lens (not to mention near an airport). :biggrin: