Calibration with Optical - Powerbook vs Cinema Display
Calibration with Optical - Powerbook vs Cinema Display
- Subject: Calibration with Optical - Powerbook vs Cinema Display
- From: pakkie <email@hidden>
- Date: Mon, 29 Dec 2003 11:00:48 +0100
Morning,
When I calibrate/profile my Powerbook (122), using exactly the same method
as for the my 202 Cinema-display (which I use on a G5), I get quite
different results. I9m aware a laptop screen is not the same thing as a
high-end LCD, but I9m surprised at the difference (may be I shouldn9t ?).
I leave color-critical work to the G5 and Cinema-display, but as a press
photographer, I often use my powerbook to quickly send roughly photoshopped
images. So I9d like to be able to trust it more or less, expecting a certain
resemblance between the laptop and the Cinema Display. Which isn9t the case.
To calibrate/profile I use Optical and a Spyder: No problems with the
G5-Cinema Display - things look OK on screen, and they print as expected in
a colormanaged workflow, both in-house and elsewhere.
The Powerbook screen (also holding a neutral grey desktop) looks much
cooler, so do the images in photoshop, and what9s more, I get a visible
posterization (and with it a slight color change) in the dark grey and
middle tones (especially noticeable in b&w photo9s & grayscale images).
Opening the same images on the Cinema Display doesn9t show these effects.
Calibrating, in Optical (standard mode, calibrating an LCD) I set whitepoint
to native, gamma to 2.2, and leave the 3enable calibration2 box checked.
Also, I calibrate in a dark room to avoid glaring.
As stated, I do exactly the same with both displays. (I don9t feel like
targeting the Cinema Display to the powerbook)
Can it be that both displays native whitepoints differ this much? And
shouldn9t profiling and colormanagement make up for this?
Setting the whitepoint to D50 or D55 in Optical before calibrating does make
a difference of course, but the end result doesn9t convince me. Posts on
this forum also advise profiling at native whitepoint (because adjusting
LCDs to a certain whitebalance is done through the videocard, and this
interferes with a displays native behavior ?)
Someone have a clue ? Or where am I wrong?
Thanks in advance for any suggestions.
Eric
Eric de Mildt photojournalist
email@hidden / email@hidden
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