With a few facts about your camera’s sensor, if you know the size of an object in your photo, you can calculate how far it was from the camera when the photo was taken.
Dougal is a web developer, and a "Developer Emeritus" for the WordPress platform. When he's not coding PHP, Perl, CSS, JavaScript, or whatnot, he spends time with his wife, three children, a dog, and a cat in their Atlanta area home.
