Here’s an inexpensive way to add a macro mode to your iPhone.
By default, the iPhone’s camera isn’t that great…let alone for macro (closeup) shots. Simply holding a magnifying glass (or plastic) lens in front of the iPhone’s camera will let you get a lot closer (and in focus):
The lens I used was popped out of a magnifier I bought for $4…I’m sure you could find a cheaper one if you look around in just about any kind of store (toy, hardware, pharmacy, etc).
Of course this ‘hack’ should work on just about any cameraphone, not just the iPhone.
Update: Looks like Griffin has integrated something like this into a case…very cool!