We do know that most of the time, you really shouldn't scrimp if you want to get the best accessories for your camera. But in this case, you won't need loads of it.

There are many makers of camera lenses out there but the ones being sold are just too expensive to experiment with. (A Nikon shift lens goes for over $1000.) In DigiHack, dennison provides us with an inexpensive way to create your own shift lens. You'll need a lens, a medium-sized flexible rubber plunger, a cardboard and a plastic body cap.

Using a knife, you hollow out the inside part and smoothen any burrs or rough spots.

Take your plunger and cut a hole in the top where you're going to stick in your lens (in this case, he used an 80mm Carl Zeiss lens). Make sure that the hole is tight enough so the lens is supported.

You then cut out a ring from the cardboard for your backing. The inner circle should be the same as the diameter and circumference of the lens cap and the outer part is the same as the plunger's bottom. You should hotglue this together. You can then attach it to the camera.

Here's an example of a picture he took. Notice that the eyelashes of the model are far clearer than most other parts of the picture, giving the photographer control over the viewer's gaze.