The remarkable Nikkor 6mm f/2.8 Fisheye - Japan Camera Hunter
Nikon 6mm f/2.8 Nikkor AI Fisheye Lens for Sale at $79,200 - Camera News at Cameraegg
Nikon Rumors on Twitter: "Collection of selected Nikon patents can be found here (pictured is the lens patent for the Fisheye-Nikkor 6mm f/2.8 lens): https://t.co/ZkMTMfib7B https://t.co/4iQFKXFxSe" / Twitter
This Massive Nikon Fisheye-Nikkor 6mm f/2.8 Lens Will Cost You $161,000 - TechEBlog