Thank you jpmccormac, dcraw helps a lot.
I could get rid of the ugly lens correction that is used in Adobe DNG converter (which is unfortunately used in Camera processing for the jpg's also).
And thanks to dcraw I now have an awesome picture without the unneeded lens correction (because the lens itself is totally awesome and draws very nice) and for my pleasure I have around 180.000 pixels more !!! too.
Thank you Stas for your support.
Now I'm using an additional Canon S70, an old cam with RAW support, and must admit that the colours are right as original with a slight more resolution with the embedded Converter as ooc pics. Very nice.
So I am looking forward to the embedded XZ-1 conversion. The colours may be spot on ... well, will see.