Here is a far better version from the same data 12MB
http://d1355990.i49.quadrahosting.co...SPL100edPS.jpg
I used PS to clip the faint stuff which was mostly noise as even the noise in the 15s exposure shows up in the HDR.
Below is the four exposure stacks and the final HDR. You can see that the brightest stars are smaller in the HDR than in the longest exposure. There is far more faint stuff also.
Here is an animated gif showing a 100% crop of the same sequence. 800k
http://d1355990.i49.quadrahosting.co...09_12/spl3.gif
Bert