János, Tóth F. wrote: >> ... (e.g. 10°) observer for spectral data. > > Did you tested it yet? I am curious about your results. At the moment I had only a look at the effect on the white point calibration. With my setup the white point with 10° observer is less green more on the magenta side, compared to the standard 2° observer (each with 6500K Blackbody). The eyes are adapting very fast, so it is difficult for me to say what white point is more pleasing to the eyes, but I tend to the 10° observer WP. I haven't tested yet, if the 10° observer gives a better match with other (sRGB) panels. Regards, Juergen