[Steve] was planning a 15 mile hiking trip when he came up with this idea. He wanted to get some good HDR photography, but didnt’ want to lug around his 5D MKII. He managed to pick up a couple of cheap Polaroid X530s. These have decent optics and record in RAW format, which is pretty impressive for something he got for 99cents plus shipping. He had all of the buttons wired for external control via a Viliv umpc. As you can see on his site, his results are quite nice. Of course, you don’t actually have to hack your camera to make HDR images.