More iPhone4 HDR

Here's a snap, with HDR (High Dynamic Range, meaning photography in high contrast conditions), and the auto-saved sample without. It's plain that it does save a great amount of data in the highlights.
It also tends to make the mid-tones kinda flat. But it is tricky processing, and maybe future updates will improve on that. In the meantime it can be helped in the computer.

Normal:

HDR:

HDR, adjusted with Curves in Photoshop:

"Curves" in Photoshop is simple on surface of it, you just pull at a tone curve. But it's trickier than one might think, because small curve changes make big differences, and it easily gets to look very odd.