Rokinon FE75MFT-B 7.5mm F3.5 UMC Fisheye Lens for Micro Four Thirds (Olympus PEN and Panasonic), Black : Compact System Camera Lenses : Electronics - Amazon.com
Canon EOS 50D. Das Kamerahandbuch: 9783836213653: Amazon.com: Books
Amazon.com : TTartisan 7.5mm F2.0 Fisheye Lens, with Creative Lens Cap and ND1000 Filter, Compatible with Sony E-Mount Cameras NEX-5N NEX-7 NEX-3N NEX-5T a6000 a3500 a5100 a6300 a6500 : Electronics
Amazon.com: Omegon Ritchey-Chretien Pro RC 154/1370 OTA : Electronics