Kristian Jörg wrote: > About that. I am considering buying the PRO version of the Chromapure bundle. > With that comes > calibration files that corrects the already quite accurate OEM meter to even > higher levels by using > a refererence spectrophotometer of high quality. Those calibration files as I > understand it is made > to different types of displayes such as LCD, plasma, LED backlight etc. As > advertised these > calibration files should make the meter very accurate with all the types of > displays that are > covered (10+ types). The calibration accuracy of the meter is determined mainly by two factors: 1) By how accurate the spectral sensitivity curves are that come with the instrument 2) by how accurate the spectral response of the display is characterised. So unless Chromapure is doing their own instrument spectral sensitivity curve calibration (possible, but takes some effort), they are limited to 2), which is nice, but ultimately limited by 1) (and other factors such as instrument stability, and the fact that it doesn't measure refresh displays quite as well as (say) the DTP94). > (I think the retail X-rite i1 Display Pro has a similar approach in its > iProfiler software) I'm not sure what you mean. They provide a set of display calibrations intended to cover a range of display technology. Hopefully X-Rite chose the particular displays as being average representatives of each technology. > First question. Is the Chromapure PRO bundle with extra reference calibration > really necessary in > practice or is it just advertising fluff? No idea. Someone with access to suitable reference measurement facilities would be about the only way to scientifically determine this. > Second question. If I do purchase the PRO version, can Argyll use those > calibration files? Presumable yes, if they are simply .EDR files. Graeme Gill.