I had a play with Phil's data. I used the common area of a mosaic I am doing and his dark sky data to produce this image.
13Mb
http://d1355990.i49.quadrahosting.co...yHDR_2L_10.jpg
I used Phil's 8bit data for this image.
He has sent me his 16bit data so with trial and error will get a better image.
Bert.