Hi,
Are you really sure that you need to do the CMYK separation yourself? CMYK separation is quite involved, as far as I understand.
Both the Color Vision and the i1display2 are colorimeters. Colorimeters measure three channels. So they measure red, green and blue but cannot tell which color red, green and blue are. Colorimeters work well with monitors using the primaries the calibrator is made for.
Spectrometers measure the whole spectrum, and therefore work with all screens. The most affordable spectrometer is ColorMunki Photo.
There have been some discussions on these forum discussing inconsistent behavior of colorimeters (initiated by a researcher who measured a bunch).
TN screens are very sensitive to viewing angle, so calibration to be meaningful you need to work with your eyes very close to 90 degrees angle to the screen.
Update: http://www.luminous-landscape.com/forum/index.php?topic=53825.msg439483#msg439483The discussion is not very positive to the ColorMunki. Also, it seems that colorimeters matched to a creation screen work much better. A colorimeter may use a special "transform matrix" for different screens.
http://www.drycreekphoto.com/Learn/Calibration/MonitorCalibrationHardware.htmlFrom above:
"Datacolor appears to have solved the worst of the manufacturing inconsistency problems seen with older Spyder 3 Elite models. On average, the Spyder 3 is a good performer. We still have concerns about the level of variability measured between units — almost 3 times what the DTP-94 shows. For wide-gamut monitors the Spyder 3 appears to be the best colorimeter choice unless your monitor vendor offers a specially-tuned sensor."
Additional reading:
http://www.drycreekphoto.com/Learn/monitor_calibration.htmBest regards
Erik
The more I read the more I get confused regarding the various devices. I am a complete novice with these so, bear with me.
I am looking to get a device to calibrate both my MacBook and the HP ZR24w that I am planning to buy (as soon as I can decide which device to get with it!). I understand that the 2 monitors are very different (at least in that one is TN and the other ISP) but I'd like them to match as well as possible. (So that any work I do on the laptop only might need a little tweaking on the monitor?) I'm looking at the spyder 3pro and the i1display2 (thinking that the newer ones are just too new from what I've read here).
The technical reports have my eyes rolling back in my head. I just don't know enough to make any sense of them. I just want to be able to somewhat accurately see colors on my monitors that will give me more confidence to print. At the same time, I have a more complex printing job that I will need to do as soon as I get this - I need to send out CMYK images to a publisher for a book. I've been advised (by johnbeardy on this site) to try to obtain an ICC profile from the printer. Does this influence my decision about which color calibration device to get?
And then there is just reading the varying "reviews" on the devices with about equal "this is the worst" and "this is the best" for each one I've looked at. I can only think that this must reflect user error but perhaps it reflects a poor choice given the job that is needed.
Can someone give me some guidance?
Many thanks.