Want to get a fisheye lens effect for your spanking new Nikon D90? Well, instead of spending a couple hundred on a new lens, here’s a DIY solution that’s going for just $16 a pop thanks to those wide-angle doorway peephole lenses. All you need are two pieces of particle board, a peephole lens, a spare lens shield and the all-useful duct tape. There is one problem though – the replacement wide-angle lens is much larger than the camera’s lens, creating a circle around all of your pictures.