Re: SOS: profiling a Nikon
Re: SOS: profiling a Nikon
- Subject: Re: SOS: profiling a Nikon
- From: Richard Wagner <email@hidden>
- Date: Sat, 1 Oct 2005 21:21:21 -0700
On Fri, 30 Sep 2005 eugene appert wrote:
I have always been unclear and nervous about input devises, either
scanners or cameras, which "guide" the user through a series of
destination space options.
Actually, options are good...
I have recently begun working with a Nikon D100 and D70 and
wondered, for example, why on earth would Nikon offer three
mandatory "input" profiles labelled as workspaces?
Eugene, are you referring to camera settings and JPEG output, or
Nikon Capture Editor settings and RAW conversion? Nikon Capture (the
RAW converter) has evolved significantly in the past year, but even
so, without question Nikon's color management and the correlation
between camera settings and Nikon Capture settings are mangled beyond
comprehension. Nikon's terminology and coding confuses rendering
intents and destination profiles.
I say Mandatory because there doesn't appear to be a way to use a
D100 or D70 without assigning one of these three "modes". I
assumed these were assigned input profiles, which could be stripped
off after exposure and replaced with my own.
The "modes" are "flavors" if you will. sRGB for People, sRGB for
Nature. Stripped off and replaced??? With what? Do you mean
"converted to" another profile?
I have been using a TIF file made with fixed raw conversion
settings in Nikon Capture Editor to make profiles for specific
lighting and polarisation set- ups in studio.
Ok, how are you making profiles from Capture? What software? I 'm
fairly certain this is not possible with Capture. You must pick a
profile (sRGB, AdobeRGB, etc) for the output - it is not like a
scanner where you can output a "raw" scan and use it to build a
profile. Capture will *always* output into a working space - whether
the default space or one you select. (A recent release fixed a bug
with Capture and Mac OS 10.4 Tiger where you could not choose an
output color space other than AdobeRGB or sRGB, e.g., you could not
output to ProPhotoRGB.)
But now, after finally finding the time to test controlled samples
using all three of these modes it appears as though the data is
different in all three cases. As far as I know the only possible
explanation for this is that the NEF file generated by the cameras
has already been converted via an input profile to a destination
workspace.
See above. It's not converted in-camera - it's converted by Capture.
The thing that mystifies me the most is that I didn't think you
could profile raw format, after all, raw format hardly even knows
its a picture, so where and when is this conversion taking place?
Nikon Capture has its own internal profiles that convert to the
output space that you choose. You can't replace these profiles with
your own.
And here is the punch line, when I bring these three NEF files in
through Camera Raw (CS 1) the data of all three files is identical,
just like synchronized swimmers.
Not surprising. The NEF has no actual embedded profile - only the
tags that say what the camera settings were when the shot was taken.
ACR ignores the output profile tags in the NEF, as you set the output
profile explicitly in ACR. The sensor data recorded will be
essentially identical regardless of the "mode" settings on the camera.
I would strongly suggest that you upgrade to PS CS2 and ACR 3.2, as
it is much improved in many respects. As for Capture, I gave up on
it (for many reasons) after PS CS2 came out. Capture is a dead
product and is at the end of its life cycle. It will be replaced by
a new product written by Nik Multimedia sometime in the future. No
further enhancements/improvements to Capture are expected.
Although I don't use it, Phase One's Capture One will allow custom
profiles. ACR does allow you to *calibrate* ACR for your camera
using an outstanding script written by Thomas Fors - there is a
version for PS CS as well as CS2. http://fors.net/scripts/ACR-
Calibrator/
Lastly, you might consider joining the Nikon D1 listserve run by
Juergen Specht. They do an excellent job of handling Nikon-specific
questions.
http://www.juergenspecht.com/lists/d1scussion/
Hope this helps.
--Rich
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