Hi Ingo,
The slider up the top of DSS is just for gamma correction for your monitor which does help show more data, but to change the actual image to get a more unaltered image just pull all the luminance settings to zero. This should give you a totally unstretched image . But you will still have to adjust the RGB gamma slider (middle one) and probally the saturation as well. I find up the saturation to like 10-15% works well..but you will have to experiment with the RGB.
Have attached a screenprint that shows the luminance..
Oh don`t forget to check apply changes when the save dialog box comes up!
Hope this helps out as I think quiet a few people have this prob to start with.
cheers Gary
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