The Delta E quality outputs are indispensable if you want to measure the accuracy of your calibration + profile and compare different options. Spent the morning fiddling with my new i1 Display Pro on my U2410. For a 6500K White Point and Gamma of 2.2, my settings are: My driver is A02-00 and the panel seems to work well in that mode. Thank you Jack, bronxman and Phil for your helpful suggestions and explanations. Getting an accurate measuring device isn't the end of the battle. On the other hand, others recommend just getting the CM and not sweating the details as much as I do. I've been doing multiple calibrations on the two cheaper ones, to try to find a combination where all three match visually, but none of them have a lot of banding. One is high quality, the others are cheaper. I have use three monitors on my desktop machine. So you might decide to relax the target values in order to reduce the banding. If the target you chose (white point, luminance, gamma, etc.) required a large change in the LUTs, you might see unacceptable posterization and banding, even if the color measures close. These LUTs are only 8 bits, meaning 256 levels. Tradeoffs: Calibrations for most monitors end up implementing the calibration corrections as a new video card LUTs (Look Up Table). Meaning that I'd recommend going for the i1DP and skipping the CM. A calibration involves tradeoffs and sometimes you end up doing several calibrations, with different target values. I have an i1DP and it takes two or three minutes to do a calibration. That the CM takes five times longer to do the calibration. Summary: The XRite i1 Display Pro ($250) and and XRite ColorMunki Display ($170) are the best calibrators that cost less than $1,000. Read this test report that compares sensors. Good to hear, if anyone has a earlier version they should probably ask dell for an exchange then Therefore I calibrate/profile in Custom mode Just as an example, if you leave your monitor at default brightness (say 200 cd/m2 for the U2410), you do not adjust the brightness down on the monitor and you target 100 after calibration, the LUT generated by your profiling program will cut every value you send to the monitor in half, thereby also cutting in half the number of visible gradations. The idea is to get as close as possible to the desired brightness and color temperature through the use of the monitor hardware (brightness and separate R,G and B controls) because it achieves those through the internal 12 bit LUT - as opposed to the typically 8 bit LUT used by the OS/video card. I am aware of 's experience: they must have tested an early model with a firmware problem (mine is A3) and I do not have such a problem based on how uniform and close to linear are the profile graphs produced by dispcalgui/argyll. found that the custom color mode is broken and that playing with the RGB guns in it messes things up and twists up the internal color engine You should use standard (native gamut) for photo editing and sRGB for other stuff. (the U2710 color engine is NOT broken though) Unless you can verify that Dell fixed it for later copies of the monitor it is probably best to avoid it. found that the custom color mode is broken and that playing with the RGB guns in it messes things up and twists up the internal color engine in vad ways. I prefer to leave color temperature as 'native'. See here for excellent free software and tutorials: You should use Custom or Standard mode only, because those give you more latitude and access to the RGB gain settings that you can use (together with brightness) to get the white balance as correct as possible before profiling. Apparently, the Custom Color mode is broken, and I should calibrate in Standard, Adobe RGB or sRGB
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