Daniel you need to take at least 10 exposures of at least 3 to 5 minutes each of the exact area, and than with software, such as Image Plus or similar align/combine, and composite a single image.
So than in effect you would end up with an exposure of 30 or 50 minutes.
This will provide you with so much more data, which you can than take to PS2 and enhance the image.
However a very good effort indeed
Leon
