Look attentionally on all over exposured and dark objects (lamps, windows et). Oh HDR photo these all have information inside, but usual LDR photos do not contain this even you use RAW of 12-16 bits. I used only 5 shots with different exposures. The HDR photo (made by my S3 with 8bits .jpg) results 32bits dynamic range photo.With more number of the shots results might be better.