Originally Posted by Mojito
I tried loading init file back into the PJ and measured. The gamma was below target as expected. With quite a bit of color temp adjustment the grayscale looks good, but gamma is still below the target even with 2.4 correction value and -5 picture tone.
I got a hold of another Spyder and rerun the calibration with great results.
The differences were obvious from the very first run of the autocal software. There were much less corrections than with my Spyder (all in relation to the fresh factory settings with init calibration):
Actually, the autocal did a very good job overall (colors and gamma), and there were very little corrections needed in the Calman. After creation of the corrected color profile this is the result:
Gamma 2.4 tweaked to BT1886:
This all brings a question: what heppened to my Spyder which worked fine before? I kept it in the stock box with antimoisture granules (whatever they are called in English), in the dark drawer at room temperature. How come it became so inaccurate?
I also experimented with the gamma settings in the custom color profiles. I created the corrected color profiles with 2.2, 2.3 and 2.4 gamma factors and with otherwise same coordinates.
It turns out that this setting does affect the gamma readings. If I select the color profile with gamma factor 2.4 and select the stock Normal gamma in the PJ, it reads gammas around 2.5. I didn't have time to experiment with various combinations, but this is something I'm planning to do.
Another interesting fenomenon that I noticed is that after color autocal the picture was actually slightly brighter than before. This was evident when after the color autocal you run the sequence again and on the meter placement screen the meter turns out to be outside of the yellow box closer to the PJ.