HDR (High Dynamic Range) Photography is simply creating images of scenes exactly as you think you see them or as you would like them to be. The human eye is greatly superior to any camera sensor, sensing a wide range of different levels of light at once without distortion.

HDR is a set of techniques to overcome these sensor limitations, combining multiple exposures into a single HDR image, then tonemapping this image to view on monitor or in print properly. Main parts of HDR are shooting and processing. The former is simply shooting in enough number of different exposures with varied shutter speed but fixed aperture value. The latter is little complicating and varies depending on the software used.

Shooting on tripod and using bracketing, with +/- 2 EV stops if possible, ranging from darkest exposure with no highlight clipping to where the darkest shadow is properly exposed, results a full and complete visual record of the view.

Processing starts with generating HDR image, then continues with tonemapping which would be done with single software such as Photomatix, Dynamic Photo HDR, FDRTools, or even Adobe Photoshop with limited HDR creation capabilities. Generating HDR image with those software is pretty straightforward, simply loading source images and selecting automatic alignment and reducing ghosting features, and lastly hitting the process button.

Now the critical issue is how to take whole range of light information in the dynamic range of a real-world scene and