Some years back we had the good fortune to obtain an Aerial camera lens, of a type that was used in several US spy planes such as the U-2 and SR-71. It was snatched up rather quickly by a private collector that would neither confirm nor deny that he'd recognized the serial number as that of one belonging to a particular reconnaissance aircraft he was attached to during the Cold War... With a front lens diameter of approximately 12 inches, maybe its 2nd life will be part of a camera, telescope, museum display or perhaps, it will assume the form of the ultimate ant burner?