János, Tóth F. wrote: Hello, > I calibrated my display with 1964_10 observer settings today. maybe I am wrong, but my latest understanding of the Eizo paper is, that they only use the 10° observer to set the white point. Have you tried to use the "native white point" option in DispcalGUI (with standard observer), after interactively adjusting the display to the 1964_10 white point? Regards, Juergen