RE: filmscanners: LS-30 Profile

["shAf" <michael@shaffer.net>]

Ken writes ...

> I found the following icc profiles, among others, in the Nikon LS-30
> profiles folder:
> NKLS2000LS30 N
> NKLS2000LS30 N SDC
> NKLS2000LS30 P
> NKLS2000LS30 P SDC
> NKAdobe
>
> Anyone know the differences and/or can anyone recommend
> which one would be the best choice to use?
> Or is there a better choice elsewhere? I am using
> AdobeRGB workspace. Thanks.

        "Best choice to use" for what purpose would be my 1st question ...
that is, I've never found any of these particularly useful as a "from"
space to working space conversion.

        'N' & 'P' refer to positive vs negative, but I have no idea what the
'SDC' refers to.

        If you have Photoshop 6, you can load any of these as your working
space ... and with the preview turned on ... preview a "typical" scan
for evaluating which offers the truest color ... but you have to first
load some type of raw scan into PS6 without any profile conversion so
that you would be previewing the raw RGB data in each of these color
spaces.

        PS6 RGB setup can also let you see rough definitions for these color
spaces.  That is, load one as your workspace, and while in the setup
dialog, then choose "custom" from the list, and it will show you these
definitions as if you wanted to modify them.  Write them down (R,G,B
primaries, whitepoint temperature, & gamma) ... cancel, and then
proceed with another.  These definitions are simplistic ... that is,
PS6 seems to calculate the 3-dimensional profile where it intersects
the 2-D plane usually used for defining working space ... but it is a
rough estimate of the color capacity of the profile ... quite useful
only for simple comparisons.

HTH ... shAf  :o)