OK people, here it is, The ultimate WA shot.
Always, it is wondered "is 12mm really much wider than 17mm?".
We can be such geeks.
Here is a comparison of the Nikkor 10.5mm, 12-24 and 17-55 lenses.
If you already know what defished means you are definitely a Nikon geek.
Here you have it.
I used Photoshop-8 to resize and layer the six images from the 3 lenses.

Here is the link to the full size image and to the "undefished" image.
http://www.pbase.com/vernix/image/41197963/original
http://www.pbase.com/vernix/image/41197964