Noob question! By the way, what is the correct way to convert from RAW to TIFF? I mean, there is a white color temperature and a huye control for the white point in both PhotoShop CS5 and UFRAW (Gimp plugin). 1: Is it OK to measure the actual light in the room with a spectro (using the ambient light diffuser), use the CCT value (and zero huye adjustment) in the software and create a profile which doesn't map the WP to D50? 2: Is it OK to set the WP to 5000K (or anything random) in the software (even if it's not correct), create a standard ICC profile and use absolute colorimetry in the software later (with the same false software WP setting)? Which one is preferable? If I create a non-standard absolute profile then can I use that for photos taken under different ambient light in case I set the actual CCT in the software? Or is the differen light (different spectral characteristics, like fluorescent tubes intead of daylight...) makes that profile useless anyway? (I guess so.) I mean... Is that profile still better than „no profile” (whatever the software assumes when I supply nothing). Problem: I am not a photographer, I just use my camera randomly. But if I have a spectro and the camera supports RAW anyway then I wish to make some use of the possibilities... I already tried to create some profiles but they were never good enough. I mean they caused some obvious color errors and the default color matrix looked more neutral (but far from perfect). 2012/4/24, Andreas F.X. Siegert <lists@xxxxxxxxxxxxx>: > On 03.04.2012 09:00, Graeme Gill wrote: >> Maybe there's something about how your workflow converts >> from RAW to .tiff that is a problem ? Maybe it's not scaling >> the RAW numbers to the full 16 bit .tiff range ? > > That turns out to be the case, AS currently has a bug here where 14bits > are just put into 16... > > Ok, so using an exposure boost of two stops in linear should do it.... > > But, at http://afximages.com/tmp/argyll > I have two NEFs: > _AFX9383.NEF > from this I can generate a profile easily everything is fine and dandy > (not that think the profile is perfect, but it shows that the process works) > and then _AFX9580.NEF > scanin will only accept this when it is overexposed which of course > leads to a dark profile.... > > Why? > Could it be that I am too optimistic with my attempts to use the > Colorchecker reference files for a mini color checker? > > thx > afx > > -- > http://afximages.com/ > >