The camera in the iPhone 3GS has improved close-up capabilities, tap focus, and more resolution than previous models. You can use the 3GS to photograph small objects, business cards, even duplicate 4" x 6" prints. With this DIY copy stand that's easy to make, you can produce high quality images with just a couple taps on its screen.
If you've ever tried close-up work with the iPhone, you know you have two challenges. The first is holding the camera steady enough to avoid camera shake. The second is getting the plane of the camera parallel to the plane of the subject to avoid distortion. This little device helps with both, plus diffuses the light for a more flattering rendering.
I have step-by-step photos showing the key elements of this project on The Digital Story Flickr page. In short, it works like this. You remove the tray from the iPhone packaging, drill a hole in it for the lens to see through, cut an opening in the bottom of a translucent box to set the tray in, and you're done. It's really that simple. I recommend that you start with a box that's at least 6" tall. That will give you enough distance to copy 4" x 6" prints. You can use "risers" such a little boxes to photograph smaller items that need more magnification. Here's a short instructional video that provides a nice overview.
Please feel free to add your comments, improvements, or variations on this project. The iPhone 3GS is a handy little camera, and I want to squeeze every ounce of capability out of it.
More on the iPhone 3GS