^ I also interested in buying another lens. I have a Nikon D40...what kind of wide angle lens should I get?
How much you willing to spend? Wide angle or Fisheye?
If i had the money, I would buy a Nikon 10.5mm f2.8 DX Fisheye lens. its around $600-650. Even though it wont autofocus oon the D40, people say just keep the focus ring locked at 6ft, and you'll be in focus for most of the shots. Cool thing is it also focuses at a 3.2cm from the subject, so you can do some wide angle macro.