profiling iMac Retina displays running OS X 10.10
profiling iMac Retina displays running OS X 10.10
- Subject: profiling iMac Retina displays running OS X 10.10
- From: Bruce Bumbarger <email@hidden>
- Date: Tue, 24 Feb 2015 11:40:52 -0500
Hello:
I've been trying to profile two new iMac Retinas using an i1Display Pro and
software. Both have the desktop set to medium gray.
Using the advanced mode, I set the display type to White LED, the white
point to D65, the luminance to 100cd/m2. Following advice found on
www.imagescience.com.au, I've set the contrast ratio to 250:1 rather than
native as I'd like the two displays to match as closely as possible. I use
the default profile settings except that I change the profile version from
4 to 2. I choose the largest patch set. I choose to adjust brightness and
contrast rather than using the ADC option and am able to adjust to 99 or
100 cd/m2, although it's not always the same on both monitors. After
running through the measurement process, on my latest attempt I get white
point results of 6506, luminance of 99 cd/m2 and contrast ratio of 278:1 on
one display and 6522, 100cd/m2 and 275:1 on the other.
Is this about as close as I'll get? It seems pretty consistent to me, but
visually one display looks to be a more neutral gray while the other seems
"warmer" and appears to have a slight magenta cast. I've tried profiling
with different white point settings, but the mismatch seems to occur
regardless of the choice I make. More than one viewer has the same
impression. Can I expect to get the screens to match? I don't have a sense
whether the difference in the results I get is large enough to account for
the visual differences one sees.
When I make a sample print and view it under the lighting we use I get what
I consider to be a good match between the screen and print - it actually
looks pretty consistent on both screens. However, the computers are in a
lab space used by students and the question does come up as to why the
screens don't match. I'd appreciate whatever advice/information that anyone
can offer.
Bruce
--
Bruce Bumbarger
Library Conservator
Magill Library - Haverford College
370 Lancaster Avenue
Haverford, PA 19041
610-896-1165
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