TAKE THREE DIFFERENT EXPOSURES ….= Take first photo in normal exposure with auto focus on …then take auto focus off and take another exposure up = + 2 stops then …then another photo = – 2 stops
You then need Photomatix program to do the rest in tone mapping…..search photomatix on line.
The reason behind taking auto focus off on the + and – shots is to stop the camera re-focusing……always use a tripod.

