Using Vintage Nikon Super-Telephoto Lenses on a Sony NEX-5

A rare Nikon 1200mm f/11 lens recently appeared on eBay. The earliest Nikon non-refractive long lenses were the Nikkor-Q 400mm f/4.5, Nikkor-P 600mm f/5.6, Nikkor-P 800mm f/8, and Nikkor-P 1200mm f/11. All of them were on the market around 1964 and withdrawn in the mid-1970. These lenses are actually lens heads and require a focus unit to be functional.