Hi,
I've profiled my
Nikon Coolscan IV ED using the LCMS profiling utilities, and Wolf Faust's
provia/astia/sensia target. I think the profile is working well. However, a
recent thread has started in newsgroup comp.periphs.scanners by Jeff
Randall, who has noticed what appears to be a lack of green gamut in his
Nikon LS4000 scanner, after he inspected the profile. I've noticed the
same characteristic in the profile I created, despite the fact that I haven't
observed any noticable problems with greens in real scans. The person who
started the thread says that he's used both LCMS (as I did), and also a beta
profiling package, with essentially identical results from
both.
The CIExy
chromacities for my profile are: R:0.63,
0.35 G:0.37, 0.63 B:0.021, 4.4e-005
Are the blue coordinates of concern, being
outside the visible spectrum? Does that suggest that the profile has a problem?
Note that my coordinates are very close to Jeff's. (the LS4000 is very similar
to the Coolscan IV/LS40)
The readme for
Wolf's targets warns that not all profilers can handle the large gamut of slide
film.
So, how well has the
LCMS profiler been tested with slide film?
Thanks,
Greg.
