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Review: Sigma 8mm f3.5 EX DG Circular Fisheye - 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
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