Some shots by this lens http://galleries.oomz.net/pub/M42/russian/peleng8mm/index.html
The Peleng 3.5/8 mm fisheye lens is available to fit for Nikon AI & F, Canon EF or FD, Minolta MD or AF or Maxxum, Pentax M-42 or K, Olympus & Contax/Yashica SLR cameras via lens adapters.(need to confirm this though)
It is compatible with autofocus cameras when the camera is used in the manual focus mode.
Field of view
180 degrees, provides a circular image (not a full-frame image) on 35mm film
26.5mm, mounts to rear element
f3.5 to f16
Price Range S$500 to S$550 depending on the mount (Including Adapter & Shipping)