Colorimeters are more precise than most people think and a lot more complex - I've had to disassemble a few (both monitor and print based). They use precise sensors for measuring chrominance on multiple wavelengths (most of the really good ones work by measuring at least 7 wavelengths for chrominance). CMOS and CCD arrays don't have a precise enough color balance and neutrality across all elements (most of the sensors don't even have an even distribution of RGB - most are RGBG based). Not enough precision for profiling. The company I mentioned in my IM makes a product that is perfect for digital photographers who print their own stuff. Extremely high calibration/profiling of both the monitor and sRGB printers for precise color workflow (most new photo printers, even though they are CMYK based, use the sRGB colorspace to try and match what the user sees on his/her screen). But the package costs $1500. They make a monitor calibration only package that's $250. Seriously thinking about that one. BOING Hey Misha! I just thought of something, it just popped into my head for some reason. You were talking about the difference in your two monitors. I wonder, does Windows allow you to utilize 2 color profiles at once, one for each of your monitors, or is it using only 1 profile? If it only uses one then you have one monitors that is correct and one that is a bit whacked out because it's not displaying color using it's own profile. Know what I mean? -=>Donald -=>Donald