Just when the world seemed safe from pinhole photography, there's DIGITAL PINHOLE!
After all that stuff about paper negatives and such, there's hope for digital camera owners as well. If you have a digital camera but no macro lens to do model shots, there's hope.
A friend of mine has been making digital pinhole shots. (Don't laugh -- I'm sensitive.) You do need a camera with interchangeable lenses. Take the lens off. Tape a pinhole to the mount in its place. Voila! No macro lens needed. Set it on autoexposure, and as close as you want to your model. The one drawback I'm aware of is that it won't be a wide angle, but we can't have everything, can we?
One nice thing about this post is that I know Nothing more about the technique. Oh, except that you can make a film camera into a pinhole this way, too.