It really isn't an issue with that meter per se. Meters fluctuate and so do displays. This is especially noticeable at the dark end, where a small fluctuation in red, green, or blue has a bigger impact due to the lower amount of light being produced than at the brighter end. The short answer is that it's normal. If you haven't done so already, on the meter selection page, check "Advanced" and make sure the low light handler is on. That will slow down the readings somewhat but make them a bit more stable.

 

The Colormunki is essentially the same internally as an i1Pro which does not have exceptional low light level performance. The fluctuation is due to the fact that the detector is not receiving adequate light which for this instrument is anything close to 1.0 fL or below. Although displays may exhibit slight fluctuations this is not what the cause of the problem is at these light levels.


If the display varied significantly enough at low light levels then the Black level would look atrocious and you would be able to see this taking place with your eyes when viewing program material. The user is describing deviations which are greater then .01 for x,y which would be a huge error.

 

I read at curtPalm that the ColorMunki can be pointed directly at the projector for calibration. Is the straight up position what I would use then?


And


according to the colormunki website, they recommend putting the munki back some distance from the screen. SpectraCal said put it right up next to the screen.


anyone?

 

being from spectracal I go with the spectracal line of thinking.


Upclose to the screen, reading off of the screen.


Readings 30% and down will deffinetly be somewhat eradic. Colorimeters do better than spectro's at low light. Spectro's do better at measuring x,y locations for the edges of the gamut. Calman V3 supports meter profiling to use something like a colormunki to profile something like a spider3 or DTP-94. Then you could use the DTP94 or spider3 with the color accuracy of the colormunki, but the lowlight perf of a colormeter.

 

Thanks, but how do I profile to use two meters?


And would pointing the munki at the projector work better?


again, thanks

 

Typically the diffusers you need to point at the projector make it sort of a wash.


Creating a profile requires doing a set of gamut reads, saving it, loading up the other meter, doing another set of reads, and then you can use the profile editor to create the new meter profile.


Version 4 has a more straight foward procedure for creating profiles.

Speaking of version 4, back to work.

 



Quote:
Originally Posted by Hagar /forum/post/18537988


Is this normal when calibrating around 10,20, and even 30 IRE gray scale, the readings can fluctuate all over the place. Is this meter just not that accurate at the lower IRE levels?

That's not my experience on a direct view display.

Quote:
Originally Posted by ghibliss /forum/post/18538761


The Colormunki is essentially the same internally as an i1Pro which does not have exceptional low light level performance. The fluctuation is due to the fact that the detector is not receiving adequate light which for this instrument is anything close to 1.0 fL or below.

That is not my experience on a direct view display.