I used the easy mode so far to calibrate my iMac 24" (the white model, matte, not glossy display).
After receiving an e-mail from X-Rite that stated, that the easy mode is not suitable for more demanding user, I did my first advanced mode calibration.
I had to choose RGB presets, as my iMac doesn't allow for manual RGB channel setup.
I chose 130cd/m2, as my iMac couldn't go as low as 120cd/m2.
I got a red cast. After looking at the screen for longer, it seems to disappear, but you get used to many color casts, even that of old 70's movies.
Compared to that, the easy mode produced a greenish cast.
I did three advanced mode calibrations for different luminance settings. The lower you go with the luminance, the more distinguishable the red cast gets.
The contrast also seems to be much lower at a lower luminance setting. (if you work on a higher luminance setting, does this give you the ILLUSION OF A HIGHER CONTRAST, while your images are actually much lower in contrast?)
Am I doing something wrong? Or am I doing it right now?