Re: Sony Artisan 1.2 Colorspaces Question
Re: Sony Artisan 1.2 Colorspaces Question
- Subject: Re: Sony Artisan 1.2 Colorspaces Question
- From: email@hidden
- Date: Tue, 2 Sep 2003 09:35:34 EDT
In a message dated 9/2/03 5:19:22 AM, email@hidden writes:
>
1) My first question concerns determining the ideal contrast ratio: 300:1
>
(PrintRGB), 400:1 (PhotoRGB), or 500:1 (FineArtRGB). I
>
>
With version 1.1, I was using the 300:1 ratio at D65/g2.2. I am about to
>
embark on a marathon project of separating many RGB graphics to CMYK. Naturally,
>
I want optimal fidelity throughout the image, but I would prefer to create a
>
realistic relationship between my shadow values in Photoshop and what I can
>
actually get on press. If I up the contrast ratio to 400-500, will I risk
>
seeing too much shadow detail and the attendant possibility of not opening up my
>
shadows sufficiently compared to the prior 300:1 ratio?
>
The typical way to detrmine this is to put a previously printed piece from
the system you will be using in your lighting booth, and seeing how its detail
matches the detail on screen. If you haven't previously had a pressrun on the
system in question, on the media in question, then its all an approximation
anyhow, isn't it? And if no system is yet selected, then you really shouldn't be
doing CMYK conversion yet anyhow; though that may well be the case... and you
may need to work from generic press standards and samples instead.
>
>
>
2) My second question concerns the new capability to calibrate to the
>
natural gamma of the monitor. What are your thoughts about this feature?
>
My thoughts are that since this was designated as the default in OptiCAL it
has spread like wildfire. For CRTs, if you are precalibrating (balancing the
guns) then this has to be done to a whitepoint value anyhow; there is no way to
balance them without defining what balanced is, and that definition is based
on a whitepoint value. Once this has been done, demanding a specific whitepoint
a second time is unnecessary and possibly counterproductive. For devices that
are not precalibrated, white balancing is a bigger issue, and may be
necessary to get a tolerable color for white on screen.
C. David Tobie
Design Cooperative
email@hidden
_______________________________________________
colorsync-users mailing list | email@hidden
Help/Unsubscribe/Archives:
http://www.lists.apple.com/mailman/listinfo/colorsync-users
Do not post admin requests to the list. They will be ignored.