One of the most useful tools in modern photography today is HDR. HDR stand for High Dynamic Range and can simply be described as a software tool that blends multiple exposures together into one photo. Take this photo for example. Because this photo was taken as the sun was setting, there is a high dynamic range between the shadows in the foreground and the bright background of the sky. By blending multiple exposure together in one photo, we are able to capture the perfect balance of shadows and highlights. Gotta love technology.