This Uber-Rare Nikon 6mm f2.8 Fisheye Lens Can See Behind Itself - The Phoblographer
Extremely Rare Nikon 6mm f/2.8 Fisheye Appears on eBay for $146,000 | PetaPixel
Ridiculous Nikon 6mm Lens Reappears, Priced at $160,000+ in the UK | Nikon lens, Fish eye lens, Nikon lenses
Nikkor 6mm f/2.8 Fisheye Nikkor lens
Grays of Westminster Through the Eyes of the 6mm f/2.8 Fisheye-Nikkor Lens | Grays of Westminster
Lensfinder.com - Ultra Rare Nikkor 6mm f/5.6. Only a few hundred of these lenses exist. This lens has a 220 degree field of view for Full Frame 24x36mm sensors. Made in Japan
Rare Lens] $160,000 Nikkor 6mm 2.8 Fisheye Can See Behind You | Fstoppers