High-Dynamic-Range Photography creates stunning photos by combining three or more photos of the same subject that were all exposed differently (often a normal exposure with a half-stop up and another with a half-stop down).I am by no means an expert on the subject of photography, but this is how I understand the subject.Photos taken by me in Yellowstone NP; Rocky Mountain NP; and Cripple Creek, CO.Made in iMovie '08. Enjoy.