RE: my 27" Chiaroscuro
RE: my 27" Chiaroscuro
- Subject: RE: my 27" Chiaroscuro
- From: Roger Breton <email@hidden>
- Date: Sat, 12 Mar 2011 14:02:13 -0500
John,
I don't see how you can trust any sort of calibration that is not hardware
calibrator-based (Spyder, EyeOne, ColorMunki, etc...)?
Trusting one's eyeball is like tossing a coin in the air.
To me, the effects that you describe are impossible to explain in "logical"
terms until you have some sort of instrumentation to quantify what you are
seeing.
Which one of your two "profiles" would you rather trust : are you comparing
to anything physical, like a ColorChecker chart?
Best / Roger
-----Original Message-----
From: colorsync-users-bounces+graxx=email@hidden
[mailto:colorsync-users-bounces+graxx=email@hidden] On
Behalf Of John R
Sent: March-11-11 11:22 PM
To: email@hidden
Subject: my 27" Chiaroscuro
Hi, normally I use the default ColorSync profile "iMac". To test if what I
was viewing was acceptable or not I decided to make a new profile in the
Expert Mode ColorSync Window. I found the expert mode calibration window
under System Preference/Displays/Color.
I proceeded to adjust the sliders in various luminance steps, then selected
1.8 target gamma as best choice, then D65, named, and saved the profile.
Remember that my choices are based upon me viewing the calibrators' slider
results and the gamma choices in real time, on screen.
To test between the new profile and the default "iMac" profile, I toggle
back and forth in the profile list window.
There is a Chiaroscuro effect using the new profile, compared to the default
"iMac" profile.
Colors are more saturated. Shadows are deeper. Subtle colors are more
saturated.
My question is: if I am calibrating the same way I calibrated CRT monitors
in the past, why is there such a dramatic difference between a calibrated
profile and a default profile on my Intel 27" iMac. Is the ColorSync Color
Calibration unreliable for Intel iMac use? I am adjusting the luminance
sliders the same way as before, matching the apples to the gray backgrounds
in the calibration windows. I am not choosing dramatic differences, I am
choosing to match apples and their backgrounds.
I think Apple needs to at least say that Expert Calibration Mode isn't
appropriate for calibrating a 27" iMac Displays.
What results does anyone else get using Expert Mode in ColorSync on a 27"
iMac?
John Robinson
John R
__________
All books are divisible into two classes, the books of the hour, and the
books of all time.
John Ruskin
iMac10,1
3.06 GHz
Intel Core 2 Duo
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