Samyang 8mm f/3.5 Aspherical IF MC Fisheye - Sample Images
Info and Reviews:
It is also sold under a number of different brands such as Walimex, Rokinon, Vivitar and Bower.
Optical design: 10 elements in 7 groups (1 aspherical element)
Lens mount: Canon EF, Nikon F (DX), Four Thirds, Pentax KAF, Sony/Minolta Alpha, Samsung NX
Covers: Full-frame (24×36mm)