Well first, it stands for High Dynamic Range. Okay, so what does that mean? It means that when you are taking a photograph with very high contrast of light, where the highlights may "blow out" (be all white with no detail) and the shadows will go black with no detail, you can take three or more bracketed exposures, preferrably in RAW, but can be in JPEG, then open them in an HDR program. The HDR program will merge the images into one photograph with details in the highlights and details in the shadows.
The best part? The program is free! Here's the website where you can get it:
Click Here www.fdrtools.com
Be sure to read the tutorials.
And, here is the website of a Popular Photography online magazine article that explains it:
Click Here
Happy shooting!
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