Martin Joergensen's photo web site
Published September 10th 2013
Holga Pinhole Lens
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