Originally Posted by delphiplasma
Thanks both for the advice. I have always thought that the meter was the most accurate way of setting the colour, as a lot of the members swear by it. However, like the greyscale settings, I suppose the meter can only give you guidance towards the correct settings, the fine tuning would be your eyes. Anyway, using the 'Blue filter' method, I have ended up reducing the colour control from 60 to 50, on the LCD display, giving a more natural colour tone. However, the same applied to the Plasma, the colour control was set to -22 and the blue filter setting is -2. The plasma has a blue only mode, so I will compare the 3 different calibrations. I think that if you have a display with standard EBU phosphors, then the 'Blue only mode' should, theoretically, be the most accurate way of calibrating colour luminance.
What people do not understand is that the 21% figure applies only to those specific primaries. The exact % luminance you are targeting has to be calculated manually for the primary chromaticities of each individual display. Only if you have perfectly accurate primaries would the quoted % figures match properly.
And to do this requires a meter that can measure your primary chromaticity pretty accurately, along with luminance. Many colorimeters can't achieve very good accuracy at this, so you should use a little common sense if you go down this route, and truly understand what you're doing and not simply target a % value thrown around on forums which is not likely to be correct for your situation.
Neither method is perfect. Use common sense either way, and if your eye tells you things are seriously off, then stop and reconsider what it is you're doing. You never want to be following some narrow method blindly without grasping its limitations. Every method has limitations, and every tool has limits. Entry colorimeters and filters certainly have significant limitations compared with other tools. And then of course there is the limitation of our own understanding, never proceed blindly with absolute confidence.