Re: HP 10ps buying info now monitor calibration device.
Re: HP 10ps buying info now monitor calibration device.
- Subject: Re: HP 10ps buying info now monitor calibration device.
- From: "Michael Lithgow from Colourhead" <email@hidden>
- Date: Sat, 24 May 2003 10:46:59 +1000
- Organization: Colourhead Digital Colour Management Services
pixie email@hidden wrote
>
My next purchase will be a monitor calibration device. I have a 20"
>
Apple cinema display and don't have a ton of cash to spend
>
So I was thinking about getting the basICColor Squid and basICColor
>
Display. Are there any others that are better?
I have recently been assisting with an LCD comparison test with an
Australian magazine, Design Graphics (also sells in USA)and the Apple
20" has been a star performer. In reference to your monitor calibration
device query, I used the ColorVision Spyder with OptiCal and the Gretag
ProfileMaker Pro 4.1.5 with the Eye One Spectrophotometer. The Gretag
solution also now has the much more affordable colorimeter option
available in addition to the version I used.
Both worked extremely well but the ColorVision software has a nice
feature which comes in handy especially with LCD calibration, the often
neglected Colorimeter Mode. There seems to some debate on the best
method to calibrate LCDs. Does one simply choose factory default or as
others suggest calibrate as bright as possible. After considerable
testing on several monitors it was found that within limits going the
brighter option resulted in a larger gamut but at the risk of throwing
out the black levels, which are less than optimal with LCDs in the first
place. It became apparent that the factory defaults were based on a
brightness level that resulted in a colour temperature that gave the
closest match to the desired white point,6500k. Adjusting the
brightness, changes the colour temperature therefore selecting a
brightness level that gives a larger gamut is a compromise that results
in shifting the white point colour temp further from the desired aim
point. This means that the calibration software has to make a larger
correction to bring it back to 6500k resulting in lost levels or if
native white point was selected then the monitor has been calibrated to
a white point that could be way off the mark.
Where the ColorVision OptiCal shone was in it's ability in Colorimeter
Mode to take a continuos reading and give a colour temp readout . It was
then a very simple task to adjust brightness to the point where it
matched 6500k, then select native white point which was now precisely
6500k and continue with the calibration knowing the levels loss was at a
minimum. This gave consistent calibrations with the best compromise of
gamut size, black level setting and white point.
This may be more info than Pixie required but I thought it an opportune
moment to mention this often overlooked feature in Optical and inform
others on the list of my findings.
Michael Lithgow
Colourhead Digital Colour Management Services
Glen Waverley
Vic. 3150
Australia
Ph/Fax (03) 9511 5031
Mobile 0425 719413
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