Grame Gill wrote: "The closer the spectral sensitivity curves to the standard observer, the less tuning or correction they need, and the wider range of displays they will operate on. (No idea though how well these new instruments work in this regard.)" But it's hard/impossible to make filters with transmissive properties emulating the spectral sensitivity curves. Hence correction matrices for colorimeters. But these correction matrices can fail for a given colorimeter when the primary of a display is substantially different than the primary assumed when making the correction matrix. Grame Gill wrote: "As I said, I understand that they have the individual instrument spectral curves in the firmware. Combine with the spectral response of any display and you can instantly compute a correction matrix for that particular instrument." Right, but these new devices, being colorimeters, can't get the 'spectral response of any display'... you'd need a spectrophotometer for that. So I don't know how they can claim that these would work with any display in the future. If that's what they're claiming. -Rishi On Tue, Jun 21, 2011 at 4:10 PM, Graeme Gill <graeme@xxxxxxxxxxxxx> wrote: > Alan Goldhammer wrote: >> >> My understanding is that both are colorimeters and not spectrophotometers. >> Presumably they are tuned in some manner of wide gamut displays but may >> need >> additional software for the future. If they are tuned, one would wonder >> about their performance on a normal display. > > The closer the spectral sensitivity curves to the standard observer, > the less tuning or correction they need, and the wider range of > displays they will operate on. (No idea though how well these > new instruments work in this regard.) > > Graeme Gill. > >