How to Make a Pinhole Lens for Your Digital Camera
Find the exact center of the cap and cut an opening.
The opening you cut (like the one in this figure) is probably too big to serve as a pinhole.
If the hole is too big, cover it with a piece of metal, as shown in this figure.
You can use aluminum foil, a piece cut from a cookie sheet, or some other thin metal — the thinner the better.
Poke a tiny hole in the metal.
Make is as small as possible. This is called a pinhole lens for a reason.
Attach your new pinhole lens to your camera.
Don’t force something onto your camera that isn’t supposed to fit. Use a cap that’s supplied by your camera’s manufacturer.
Look through the viewfinder to see a fuzzy, dim image.
This is what the world looks like through pinhole photography.
Mount your camera on a tripod and shoot time exposures.
Your aperture is so small (it’s a pinhole!) that your pictures need long exposures, even in bright daylight. This figure shows an image exposed for three seconds with a pinhole lens on a digital camera.