Amazon.com : Rokinon HD HD8M-P 8mm f/3.5 HD Fisheye Lens with Removable Hood for Pentax : Camera Lenses : Electronics
8mm f/3.5 Fisheye Lens: Samyang, Pro-Optic, Bower
Samyang 8mm F3.5 Fisheye Lens - Pentax Mount
Amazon.com : Rokinon HD HD8M-P 8mm f/3.5 HD Fisheye Lens with Removable Hood for Pentax : Camera Lenses : Electronics
8mm F3.5 HD Fisheye – Samyang US
Amazon.com : Rokinon 8mm f3.5 AS IF MC CSII DH Fisheye Lens with Removable Hood for Olympus and Panasonic Micro 4/3 (MFT) Mount Digital Cameras (HD8M-MFT) : Electronics
Rokinon 8mm F3.5 HD Fisheye Lens w/Removable Hood for Pentax K Mount + Protective Lens Case, Spider Flex Tripod & Other Accessory Bundle - Walmart.com