Re: i1Display x i1Pro
Re: i1Display x i1Pro
- Subject: Re: i1Display x i1Pro
- From: "dpascale" <email@hidden>
- Date: Fri, 27 Mar 2009 20:41:41 -0400
Marco,
best of possible results, I still wonder what kind of incremental gain is
achieved this way.
I have observed, and measured, that the i1 Pro, like ALL instruments, is
sensitive to temperature. Some instruments seem to be more efficient in
controlling this offset, but I have no statistical data to promote one
instrument against the other.
This sensitivity to heat can be easily verified by first making a
calibration, the making sequential emission measurements of a black
cardboard (which should be zero) while the unit is heating on a monitor (and
not calibrate again for the purpose of the test!).
As Roger mentions, and as I strongly recommend in my documentation (I also
read the IDEAlliance test results ;-) ), you should let the i1 stabilize on
the monitor while the monitor is stabilizing itself (30 min to 1 hour).
The improvement will be in the shadows since this is where a shift in
instrument noise will have more effect.
Danny
----- Original Message -----
From: "Marco Ugolini" <email@hidden>
To: "Roger Breton" <email@hidden>
Cc: "ColorSync Users Mailing List" <email@hidden>
Sent: Friday, March 27, 2009 8:10 PM
Subject: Re: i1Display x i1Pro
In a message dated 3/27/09 4:38 PM, Roger Breton wrote:
It has been shown that, when the i1pro is left hung to the display for 15
to
30 minutes, before taking measurements, thermal drift issues with shadow
details are minimized. That's the technique used by IDEAlliance for
monitor
certification at RIT.
Hi Roger.
The folks at RIT (I guess you mean their MCSL) are a very demanding bunch.
Among the best color scientists on the planet, without question.
Though I have no doubt that they are highly motivated to achieve the very
best of possible results, I still wonder what kind of incremental gain is
achieved this way. Substantial? Or small enough not to make a
life-or-death
difference to a reasonably demanding user (meaning non-obsessive)?
Marco
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