Pentax 500mm f4.5 Manual Focus Telephoto Lens (No Mount) [AS-IS]

This is a relatively fast telephoto lens made by Pentax. This one has a few condition issues. There is no mount, it seems to have been retrofit to a telescope or something or the like, but I am not sure exactly what it fits. The back end of the lens from the focusing ring on is loose, it wiggles and I cannot find the source. There is also a good dent on the body of the lens and a stripped alan screw protruding from the makeshift mount. The glass is clean and scratch-free with no haze, fungus, nor other issues. The focus and aperture are smooth. Lens caps and the tripod collar are included. This is an as is sale. SKU: 240529-14