Re: Colormatch vs Adobe 98
Re: Colormatch vs Adobe 98
- Subject: Re: Colormatch vs Adobe 98
- From: Roberto Michelena <email@hidden>
- Date: Thu, 31 Jan 2002 15:06:29 -0500
While most of the discussion is centering about D50 vs D65, brightness is
not being mentioned, and I believe that to be an important factor.
Our perception of saturation and hue changes with brightness; a monitor
(CRT) calibrated to D50 at 70cd/m2 will very likely seem too red, while
another calibrated to D50 at 100cd/m2 will seem perfectly "white".
I remember seing a draft of ISO reference conditions for softproofing, and
the recommended brightness was I believe 100cd/m2 with a minimum of 90.
I bet 8 out of 10 (or more!) of our dear listmembers can't reach 90cd/m2 at
D50 on their CRT monitors.
So what do you do now? Calibrate at D65, so you see it whiter, and also will
help you reach maybe 85cd/m2 or so.
In imprecise and probably wrong terms, I would say in a CRT the cast of D65
at 75-80 cd/m2 is visually equivalent to the cast of D50 at 100cd/m2.
Now if you want to throw viewing booths into the equation ...
-- Roberto Michelena
EOS S.A.
Lima, Peru