Following your suggestion to try ViewNx2 I have selected a few images in My Gallery. Looking at the images on site I can see defects that were not so obvious before posting. Your comments would be most appreciated especially when clicked on to view larger picture.
I do like the program even though not all options are supported for the D50. I have already dealt with the more obvious defects (saturation, tone etc)and altered my basic settings. It is raining heavy so I cannot test the changes yet.