Re: Monitor White Point-5000 or 6500K?
Re: Monitor White Point-5000 or 6500K?
- Subject: Re: Monitor White Point-5000 or 6500K?
- From: Ibis Itiberê S Luzia <email@hidden>
- Date: Tue, 07 Jan 2003 00:27:51 -0200
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Hello all...
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I'm trying to get a sense of what people are using/recommending for monitor
white point. From what I can gather, there seems to be two camps...6500K and
5000K. Those using the latter are mainly concerned with matching press proofs
that they're viewing under a 5000K viewing box. I use 6500 in a profiled and
color managed workflow and do mostly photography-related imaging and have had no
problems. Yet I have one colleague who swears that anything other than 5000K is
heresy and I should not even think of recommending 6500K to photographers. My
sense is that he is not working in a fully profiled environment and is still
relying on last minute visual tweaks to match a proof.
If your illumination is around 6500 K you are fully right. If not so,
perhaps something was not well understood. Anyway, you have the freedom to
decide what white point setting works just fine for you, but remember: don't
expect the colors you match and approve under your "6500 K color managed
lab" to behave the same way in the rest of the world which are closer to
5000 K than 6500 K. Thats why people build standards: in order to use a
common protocol to comunicate things. Be carefull with your suppliers and
clients.
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I realize that 5000K is still considered a "standard" for press work, but how
relevant is that in a color managed digital photo studio? 5000K on a monitor
looks much more yellow (too yellow for my tastes) than transparencies on a 5000K
light box or a print in a viewing booth. I'd certainly appreciate any feedback
on this issue. I'm trying to put together recommendations and information for a
photography program (both fine art and commercial).
It makes me remember that everything in nature is relative (Albert
Einstein). That sounds me really funny that 5000 K looks more yellow because
I see 6500 K bluer ! It depends on your reference. As you are obvously more
used with 6500 K you certainly will see 5000 more yellow (because your eyes
and percepcion are more adapted to this kind of environment). As I am more
used with 5000 K, I see a monitor under 6500 K sensibly bluer. But, in fact,
there is at least one thing that makes you have a point and makes 6500 K
have an advantage over 5000 K: luminous efficiency. Luminous efficiency is a
fisical property associated with radiant energy sources that correlates it's
luminous flow and color temperature. Not all radiant energy sources behave
the same under the same color temperuture. In other words: if you change or
vary the color temperature of the radiant energy source you will get
different levels of light intensity. The vast majority of the monitors on
the market (including Apple's) are not build to have a good luminous
efficiency under 5000 K (they decrease it's brightness and luminous flow in
about 50% when you set it's white point to 5000 K !). The only brand which I
can be confident to have a good Luminous efficiency under 5000 K is Barco,
because it's tube is greater and accelerates the electron beam up 100 % more
than the normal brands on the market. But be carefull with them: remember
that they where projected to work under 5000 K and not 6500 K, so under
higher color temperatures it will emit more hazardous radiant energy (eg.:
XRays)
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Thanks!
Best regards
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