The blog Daily Pete has an in-depth guide to High Dynamic Range photography, which is combining several shots of the same subject with differing exposures, to create one image with more detail in the highlights and shadows.

“There is a lot of talk on the Web about true HDR images. Lots of people argue that a HDRI from 1 RAW file isn’t a true HDRI. I personally believe that the end result is all that matters. If you sell a print in a gallery is the buyer really going to care if its a true HDR image or a “HDR” image? Are they really that bothered about how many bits of colour there are or just how much data there really is in the image? Probably not. They may ask how you created it out of a passing interest but are they really truely going to care? I doubt they will.”

Website: Daily Pete - HDR Tutorial: How to create ‘High Dynamic Range’ images using Photomatix