Re: Working space for Lightjet / Ektachrome Space
Re: Working space for Lightjet / Ektachrome Space
- Subject: Re: Working space for Lightjet / Ektachrome Space
- From: neilB <email@hidden>
- Date: Thu, 11 Oct 2001 11:00:43 +0000
Rudy
I presume you mean a workingspace not a printer device profile?
Anyhow taking it you mean the former I'll reply that it is very
important in any case end even more when working towards a large
gamut output device to use a workingspace which does not clip
colour [read detail AND separation in strong colours] when moving
from scanner space to workingspace. Since input > workingspace
conversions are always Relative Colorimetric you need to be real
careful here. For me the issue is to respect the original and then
reduce the gamut manually to fit the destination.
Joseph Holmes, highly respected US fine art landscape
photographer and colour guru [the architect of Colorblind Prove
it!] designed <Ektachrome Space, J. Holmes> to contain <just
about> all the colours in a good scan of a Kodak IT8. [Therefore
neatly emcompassing the capability of a well saturated Ektachrome
film] and with particular reference to the making of Lightjet
prints.
These spaces have none of the problems of even larger spaces,
wherein problems with posterization can occur when working in 8
bit. However in such a workflow I'd still recommend 16 bit for the
big tonal and colour edits, then go to 8 bit for the Photoshop
toys, layers etc. As in almost every case it would be worth trying
a Relative conversion in preference to Perceptual - using PS6's
excellent soft-proofing to your destination space - and carefully
optimizing a copy of the file by reducing gamut in specific areas
whilst observing a second view with gamut warning active.
You can buy the <Ektachrome Space J.Holmes> workingspace from Joe
himself <email@hidden> [with a very useful set of plus and
minus saturation versions] if you have Photoshop 6 I'd definitely
recommend that option. Or use the slightly less sophisticated
free version <EktaSpace PS5,J.Holmes> which is a free download
from Chromix.com or profilecity.com.
More about the workingspaces:
[from an earlier post, forgive any repetition please]
Joe's original is "Ektachrome Space, J. Holmes", it works in LP
and PS 6 etc, not ps 5.x. I believe that it took weeks of work to
get it right. And to put the record straight I understand that it
was designed to just barely encompass all the colours from a Kodak
IT8 target, which is considered to pretty much demonstrate the
full gamut of Ektachrome film.
The free one which was specifically made to work in PS 5.x is
"Ekta Space PS 5, J. Holmes"
They actually have different gammas, according to Photoshop 6 they are:
"Ektachrome Space, J. Holmes" is Gamma 1.99,
"Ekta Space PS 5, J. Holmes" is gamma 2.2.
As I understand it the gamma of "Ektachrome Space, J. Holmes" is
set particularly to favour the Cymbolic Sciences Lightjet.
The original "Ektachrome Space, J. Holmes" is apparently more
sophisticated and when you buy it you can get 16 extra versions
with slight variations in Saturation, plus and minus. In practice
you "apply profile" the variation to a file in Ektachrome Space,
watch the file change on screen and then P>P to your print space.
Great - and seems to me better than Photoshop's saturation slider.
the saturation variations are +/- 6,12,18,25,31,37,44,50
So I guess, apart from updates to keep up with Colorsync progress,
there are 18 variations. He makes a few saturation variations on
"Ekta Space PS 5, J. Holmes" too but certainly not 16.
On 10/10/01 at 1:05 pm, email@hidden (rudy harvey) wrote:
>
Hello all.
>
>
Just wanted to know if there is a recommended working space
>
for Lightjet and Lambda photographic output, or is Adobe RGB
>
ok?
IMHO no
>
>
Best Regards
>
>
rudy harvey
sorry it's a long answer
Regards
NeilB
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