Re: Monitor White Point-5000 or 6500K?
Re: Monitor White Point-5000 or 6500K?
- Subject: Re: Monitor White Point-5000 or 6500K?
- From: Roger Breton <email@hidden>
- Date: Tue, 07 Jan 2003 08:13:58 -0500
Call me old fashion or stubborn or short-sighted but I keep my guns to 5000K
-- no pun intended. I once tried 6500K as some eminent members of the list
suggested (Don H. and Bruce F.) advantages for doing so. While I did
experience a brighter display in my images in Photoshop at that particular
calibration (more radiant energy coming out of the CRT because the increase
in the blue gun, set at a higher intensity to match 6500K, makes for higher
luminance), I also experienced higher fatigue (call me physically
inadapted). In my experience, I found working all day long on a 6500K
calibrated display more tiresome than 5000K. Yes, the screen 'looks' more
yellowish -- that is physics and my eyeballs at work. But, ceteris paribus,
6500K was too bright for me. True, at 5000K, on my Mitsu900u, I have to
admit that I concede some luminance. I only get around 85 cd/m2 at 5000K.
But in the dim lighting of my studio (less than 30 lux) I find that this is
plenty. Moreover, I can attest that images displayed at 6500K physically
appear different in Photoshop (using 'mental absolute colorimetry' -- ever
heard of that?) despite what I tought intuitively I would get. I mean
standard IS0-12640 images like the Musisians and the bicycle did not
appeared "credible" all of a sudden with whathever standard CMYK profile I
ususally tag these images with. That, my friends, is irregardless of
Bradford chromatic adaptation scheme going on behind the scenes in
Photoshop, to convert to the screen. I could be wrong but that's the state
of the art of my limited knowledge today. Unfortunately, I don't have all
the more accurate instruments of the world, like a CS-1000, to corroborate
my visual impressions.
So, call me a contrarian but that's why, for now, I stick with 5000K which,
incidently, happens to be ISO-3664 compliant. I would refer anyone
interested to read more on this subject to Pira in the UK. They have
published in 1998 an excellent 90 page book on the subject entitled
"Guidelines for choosing the correct viewing conditions for colour
publishing", 2nd Ed, by Tony Johnson and Marcus Scott-Taggart. It may helped
you as it helped me then. Hey, there were no RWCM back then!
Finally, I know that other well-respected members of the list (Don. H and
Neil S.) many times suggested matching monitor white points to that of
proofing substrate with the help of ProfileMakerPro (and soon with
basICColor for Display) but that is not a direction I had the chance to
investigate yet in my work (still only 24 jours in a day, you know, even
after flipping the calendar to 2003!).
My two cents,
Roger Breton
Laval, Canada
email@hidden
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