8mm F3.5 HD Fisheye - Rokinon Lenses – Rokinonlenses
Samyang Optics
Review: Rokinon 8mm f3.5 Fisheye (For Nikon) - The Phoblographer
Amazon.com : Rokinon HD8M-N 8mm f/3.5 HD Fisheye Lens with Auto Aperture Chip and Removable Hood for Nikon DSLR 8-8mm, Fixed-Non-Zoom Lens : Camera Lenses : Electronics