Re: D65 isn't 6500k?
Re: D65 isn't 6500k?
- Subject: Re: D65 isn't 6500k?
- From: Chris Murphy <email@hidden>
- Date: Mon, 2 Dec 2002 19:24:26 -0700
On Monday, December 2, 2002, at 06:04 PM,
email@hidden wrote:
When I choose D65 or 6500k with OptiCal there is a visible shift and
when I
use the Spyder as a colorimeter reading the difference is confirmed. I
always assumed that the D65 is 6500k, isn't it?
What's really happening is something called correlated color
temperature. You don't really have a monitor that's heated up to 6500
K, but what we're referring to is the simulating the appearance of a
black body heated to 6500 K.
So what's probably going on is there is a slightly different correlated
color temperature associated with D65. I'm not sure off hand what it
is. But really, it's impossible to calibrate a monitor to D65 because
D65 is an illuminant, which implies a specific spectral power
distribution. Monitors have their own unique SPD and that's not
something that can be affected merely through calibration.
Chris Murphy
Color Remedies (tm)
Boulder, CO
www.colorremedies.com
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