Nikon 16mm f/2.8D AF Fisheye Nikkor Lens
This 16mm from Nikon won't have as much distortion as shorter fisheye lenses, and still offers that 180 degree perspective. The fast f2.8 aperture means images are bright, yet still full of contrast, thanks to four filters at the back of the lens. The fast aperture and seven blade diaphragm should give photos a nice depth of field. Nikon has also included their Close Range Correction system into this design, so subjects are crisp and focused. With a minimum focus distance of just under ten inches, this lens works with macro shots as well.