Charles J. Hirsch of RCA, in November 1964, published a paper in the IEEE Transactions on Broadcast and Television Receivers, "A study of the need for color controls on color TV receivers in a color TV system operating perfectly." In this paper he analyzed the effects of differences in spectral response among individual observers with normal color discrimination, as recorded by Gibson and Tyndall in 1923-24. Hirsch's conclusion was that with NTSC primaries (similar to Adobe RGB), adjustments of +/- 20% or more in the proportions of a mixture might be required to nullify the extremes of observer differences. In other words, do not expect that you are a match to the standard observer, and expect to see some difference between displays that have different spectra. I, too, have two disparate monitors, and they do not match exactly to my eye when the i1pro says they should. I use the larger, wider gamut one for judging images and the smaller one for menus. I also note that the mismatch when first turned on is much greater than after 30 minutes of warmup. I suspect this is due to change in the color of the fluorescent backlight as the internal pressure stabilizes. -----Original Message----- From: colorsync-users <colorsync-users-bounces+waynebretl=cox.net@lists.apple.com> On Behalf Of Roger Breton via colorsync-users Sent: Wednesday, February 05, 2020 10:21 AM To: colorsync-users@lists.apple.com Subject: Two monitors, side by side I managed to pull my old CG-21 of the moth balls, to serve as a second display - how could have I ever lived without this convenience? Crazy. Of course, first thing I did was to try to make it "look" like my NEC PA271W. They're both LCD monitors yet, at the same chromaticity and Luminance, they don't look the "same". One is "reddish" (CG-21) while the other (NEC) is "greenish". Any suggestions? / Roger _______________________________________________ Do not post admin requests to the list. They will be ignored. colorsync-users mailing list (colorsync-users@lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/colorsync-users/waynebretl%40cox.net This email sent to waynebretl@cox.net