For any non-geeks that have stumbled across this, HDR refers to an image with a High Dynamic Range. That just means that there are more than 256 tones of a single color (Red, Green, Blue). Your eye can see in the light from a starry sky. It can also see on a sunny day. It’s sensitive to a lot more than 256 tones. The camera is capable of recording more than 256 tones too, and if you make multiple images of the same thing, you can change the exposure of each image, so that the camera will record any range of tones you like. Then all you need to do is figure out how to combine those images in order to to print them, or put them on a display screen.