Wolf,
Sounds interesting, how are you producing the slides or do you have a
standard set. Not a great idea to have everyone produce the slides as
every film recorder is different, and there is as many problems there
as in scanning.
The slides were produced using one of my film recorders here. The
recorder was setup to give maximum gamut/density range, but the test
slides do not provide the maximum gamut because of various limiting
reasons. But they are fairly close to the maximum density possible.
The slides were than individually measured as you can see from the
measured files available on the test site
Difference between film recorders surely do exist and for instance the
mentioned Agfa PCRII+ is not able in my oppion to produce such test
slides without major hardware changes. But otherwise it really doesn't
matter what film recorder did produce the test slides as long as the
output gamut is close to the maximum possible and the produced films
are than measured.
Film densities top out at about 3.6 for Kodachrome 25 while Ektachromes
are in the 3.2-3.4 range for D-Max. This is after running a few E6
lines and having read many test strips.
Yes. My experience: The density ranges for most films are provided by
the film manufacturer in their film specs. I am afraid they hardly
provide any data about the color gamut. I usualy find the listed
density values to be fairly correct with my practical experience. The
DMax/DMin value you reach can be a bit better or worse depending on
your lab developing the film. A lab not reaching decent DMin/DMax
values is usualy a good indication for a bad process control (or
worse) and I would avoid the lab for developing any film.
Based on test I made with various labs, Ektachrome can reach a DMax
arround 3.6 in practice. Looking at the old and new Fuji Velvia, these
Films easily reach values >3.6. I even measured values above 4 on a
Velvia 100F. Very impressive new stuff.
I also noticed you used the Epson 3170 which in this country is a $120
I did not use this scanner
One of the first user willing to scan
the test slides had a 3170 ;-) Of course I also welcome a V700 and
other scanners users. I am afraid the drumscans provided so far
always had to be deleted because of obvious faults in the scans. But I
just got some more drum and other scans and should make them available
online within the next days. After all, we should not forget that the
slides were mainly made for testing color profiling software under
practical conditions. Popular low end scanners might be far more
demanding for profilers than a drum scanner. A good profiler should
handle both well...
So if you have a set of slides for me to scan on an Epson V700 I'd be
willing to do it.
Yes, of course... Please email me your address and I will shipp you a
reflective and slide test set as soon as one becomes available.
