UsedPhotoPro on Twitter: "#foundatUPP: Here you see the Nikon Nikkor AI-S 8mm f/2.8 fisheye. Three versions of this lens was manufactured over the span from 1970 to 1997: non-AI, AI, and AI-S.
Rent a Nikon / Nikkor 8mm T2.8 Fisheye Lens, Best Prices | ShareGrid Los Angeles, CA
Nikon 8mm f2.8 Ais #243308 | eBay
Nikon 8mm f/2.8 Fisheye
Using the Nikon 8mm f/8 Fish-eye Nikkor as Intended: for SCIENCE! | Fstoppers