If such thing does exist? But my question is more a question of implementation than what's best. I'm doing some programming of my own, having fun with my new colorimeter, and finally having the means of driving it to my heart's content from my computer. I am wondering what I should set its gamma response to, numerically? I don't have grand ambition (for the moment). I'd be happy just to set it along the lines of 2.2. I have measured my monitor "native" gamma curve, obtained from merely selecting 2.2 from the OSD gamma option. (Samsung 2693HM monitor). Excel file with the result is available here : http://cid-6ad0d45125f0fb40.office.live.com/browse.aspx/Shared?Bsrc=EMSHOO&B pub=SN.Notifications My question is how "low" do I actually let its luminance fall at the dark end of the "spectrum", sort of speak? I mean what should the black point be? I know there are important issues in physically mapping the black point, and that's why sRGB (I'm trying to find documentation) has a special treatment for the 0 to 32 ish RGB values range, in terms of luminance, for good visual reasons. There is also the issue of leaving black fall as dark as possible, to maximize dynamic range, but there is also the issue of selecting a black point that creates the most neutral blacks, at the expense of some dynamic range. The better monitor calibration package have that option... All help is appreciated. Let me know if you find my method of sharing documents conducive for you. Before you ask, this instrument is capable of good dark measurements. / Roger Breton