Re: new eye one ruler question
Re: new eye one ruler question
- Subject: Re: new eye one ruler question
- From: Marco Ugolini <email@hidden>
- Date: Fri, 24 Feb 2006 00:37:20 -0800
In a message dated 2/23/06 2:32 AM, Rolf Gierling wrote:
> This is not only your observation, but mine too.
> But most worse, the same happens when calibrating the instrument.
> I almost always avoid to do the calibration in an light ambient.
Hi Rolf.
I too am starting to think that that is an important caution. Possibly, it's
even better to have something like a black cloth (like the ones used for
view cameras) completely to cover the spectrophotometer during calibration
on the white tile.
> There is a second scenario where things go wrong: In monitor calibration.
> My guess is that there is a black calibration too, and if calibrated in
> too light ambient, the results are worse.
True. I had a very hard time once a while back when I was trying to figure
out why my monitor profiles (made with basICColor display 3) where coming
out different every time when using my EyeOne Display 2, though I was using
the exact same software settings each time. I kept doing the black
calibration on top of a table, just like the manual says (apparently
implying that it doesn't matter whether the tabletop is light or dark, which
I find hard to believe).
But I had an idea, and placed the colorimeter inside a black photo lens
pouch that I have (one that I used for an old 50mm Zuiko lens of mine). I
then cut off all access to the ambient light by holding the pouch's opening
tightly closed with my hand during the black calibration. That worked like a
charm. From that point on my measurements became very consistent from one
session to the next. I strongly recommend this precaution.
Regards.
--------------
Marco Ugolini
Mill Valley, CA
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