It can't get much worse than this! And that's the whole idea. A plastic lens, which doesn't even have a lens, but features a pinhole disc for extra mediocre image quality. For 20 USD...
Holga Pinhole Lens for Nikon DSLR Cameras HPL-N Ø=0.25mm
This was a Kickstarter project that I supported and which resulted in a DIY kit for a beautiful Camera Obscura - a wooden box with a simple lens and a ground glass backplate.
