Perplexed and can't find my way out of this one. I'm seeing a regular shift to red when editing JPGs and using my PA271W
Hardware:
. Mac PowerBook Pro, 13" (late 2009, 2.26 GHz dual core, 8 GB RAM, NVIDIA GeForce 9400M w. 256 MB VRAM)
. NEC PA271W
. NEC 2490WUXi2 (home office -- I use this or the 271, but not both, in a dual-monitor set-up with my laptop)
. ColorMunki Photo
Software (all completely up-to-date):
. OS 10.6.7
. Aperture 3.1.2
. Photoshop CS5 12.0.4 x64
. Safari 5.0.5
. SpectraView II 1.1.07
I shoot only RAW. I work on both RAW and JPG (and other formats). My RAW workflow with both the 2490 and the 271 is completely color-controlled, though at times using the 271 I get over-saturated colors in Safari (at times I don't -- can't determine why).
It is when I edit JPGs that I get completely baffled. Sometimes, I have no trouble. Sometimes I get either a stronger-than-usual saturation; often I get a shift-to-red, particularly in skin tones. Again, I cannot figure out what triggers this. Once the problem occurs, rebooting does not clear it. Neither does changing the monitor profile (using Spectraview II). It is likely this is a per-image issue, but because of the way Aperture creates Version on-the-fly, I have trouble confirming this. Opening exported JPGs shows the same shift.
I had thought that using an RGB profile on the 271 stopped the red-shift -- but then I started to happen again. I have tried both Adobe RGB and sRGB profiles. When editing RAW I use a profile with "Color Gamut" set to "Native (full)". The only customization of the SpectraView targets I have done is to lower the luminance (I generally work at 85 cd/m^2).
My sense is that this is a common and simple condition caused by my ignorance. Any help is most appreciated.
Kirby.
