I have printed the NI calibration target on white and thick color copy paper on HP Color Laserjet 4500N. Then when the sun was rather low on horizon (so I could do all ISO settings under the same circustamstances and in one go) set the white balance to the central area 128 and took 5 shots each (ISO Auto, 50, 100, 200, 400) in raw and JPEG mode. I made the shots close up with the manual focus set to infinity to blur them on purpose. Then back at PC for each I did a rough noise analyzer on the central area 128 then clicked on "Auto fine-tune" and saved the resulting DNP files.