HDR is short for High Dynamic Range. It is a software technique of taking either one image or a series of images, combining them, and adjusting the contrast ratios to do things that are virtually impossible with a single aperture and shutter speed.Most of the images in “Your Top 100 Favorites” are HDR, so you can take a look there if you want to see more examples than in this tutorial.
I will post a few interesting HDR photographs that I have taken that people seem to like.This one immediately beneath has the honor of being the first HDR photo every to hang in the Smithsonian Museum in Washington DC. I think this goes to show how mainstream and accepted HDR can be, if the technique is properly applied.
For more on the HDR tutorial and the source of this article, see Abduzeedo at http://abduzeedo.com/really-cool-photo-art-tutorial



