Turn Your Webcam into an IR Spycam
Posted 01/01/2006 at 12:07pm
| by Niko Coucouvanis
Step 3: Filter Fabrication
Dig out the family photo album or shoebox, and find a fully exposed film negative (it'll look totally black). Carefully cut two pieces of film to match the filter you removed from the camera. If you're using a camera like ours with a recessed filter holder in the lens barrel, cut your film a skosh bigger than the original filter so you can easily wedge the new filter into place. If your camera lacks this convenience, you can sandwich the filter between the image sensor and the lens, or use an eensy bit of glue-just keep it off the lens and sensor.

Cut the film just right, and your new filter will wedge into position.