Re: 2 questions about monitors
Re: 2 questions about monitors
- Subject: Re: 2 questions about monitors
- From: Andrew Rodney <email@hidden>
- Date: Wed, 21 Sep 2005 11:33:26 -0600
- Thread-topic: 2 questions about monitors
On 9/21/05 11:14 AM, "Alex Villegas" wrote:
> That's it... I know that it works, but I'd really like to understand
> the mechanics of it. If someone asks me the reason why I use 6500K on
> the monitor and 5000K lighting, I simply can't explain.
First of all, it's a tad dangerous to use Kelvin to define the color you're
hoping to nail since many differing colors of white can correlate to the
same value. If all light sources were true blackbodies a particular color
temperature would produce the same color of light but that's not the case.
Let's stick with standard illuminants and assume that when we actually tell
the calibration software what we want, it's using these target values.
Logic would dictate that since we are going to view our prints under
controlled lighting of D50, we should also set our display¹s white point to
D50. If our display luminance level was as bright as our viewing environment
and our paper color was perfectly neutral would likely work just fine.
It is common for users who calibrated their displays to D50, especially a
CRT to find that their image previews appear dim and a bit too yellow. On
many displays it is harder to achieve high luminance levels at D50. The
white of most photographic paper is pretty blue when viewed under a D50
illuminant.
The more common photo papers used these days provide a better screen to
print match when you calibrate to D65. As mentioned in a previous post, we
hope to achieve a match between the white of the paper and the white of the
display. I usually suggest that if you're working with these kinds of papers
you start at a target value of D65 for your display calibration and see if
you get a satisfactory match. With some of the warmer papers found in
commercial printing, D50 can often work better as a target value.
Andrew Rodney
http://www.digitaldog.net/
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