FS: Bower 8mm f3.5 Fisheye for Canon EOS System. It's actually intended for the APS-C format sensors but it'll work with a full frame or 35mm camera at a similar angle of view. This is how it looks on a 5D MK II
New on Amazon, these are $270. I'm asking $225 shipped in CONUS. I still have the box, and, presumably, everything that came with it. I only used the lens a couple of times - I'll get a couple of photos of it posted but its pretty much as new. I just never seem to have a use for it.
IMG_9855o by Fotoguy20d, on Flickr
and on a crop factor camera:
IMG_5872 by Fotoguy20d, on Flickr
IMG_5829 by Fotoguy20d, on Flickr