Camera w/ Automatic Photo Sequence Function

[relivemagic]

Hello,

I need to buy a digital camera that has a function where you can set it to automatically take a photo at set intervals (ideally as often as every 1/2 second) and over a relatively longer time (ideally over the course of hours, not just minutes or seconds).

Are there any digital cameras that have a feature like this? Any ideas or advice would be appreciated.

Thanks!