Hi all, I am trying to build a camera profile for a Canon 5D MKIII and it is proving to be much harder than with the other cameras that I profiled in the past. I am working on a profile to be used with Ufraw. For the other cameras I was using a non-linear profile (gamma 0.45, linearity 0.10) built with the following colprof parameters: -qu -bn -y -al -nc -u With these profiles on the 5D I obtain a profile that works well with highlights, but has problems with the black point: the images look foggy and they require manual black point compensation. Furthermore, the "black" is not black but it has some color cast (if I measure it I get something like red 15, blue and green 4). Even more, when using a profile obtained with the -u option (which I used with success with other profiles) I cannot get any value above around 250 even burning the whole image. The profile that seems to work best is a linear profile obtained with the following colprof parameters: -qu -y -am -bn -nc Even if it is a bit flat and it brings out a yellish cast in some lightning conditions (that can, anyway, be corrected by changing the white balance). I have tried all the possible profile kinds, both by using the -u flag and not using it. I even tried with -U with no success. The black point problem is especially annoying and I cannot get rid of it with most of the modes (S and m seem to work better than other modes, especially without -u). Any comment or suggestion related to the problems above (especially the one with black point) will be highly appreciated. Tanks! Regards, Alberto -- Home page: http://www.alari.ch/people/alberto Photo galleries : http://albertoferrante.name Public key: http://www.alari.ch/people/alberto/keys/yahoo.asc