[argyllcms] Re: Wrong gamma / color rendition worse than before calibration
- From: "Thomas Bartosik" <tbartdev@xxxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Wed, 14 Sep 2011 17:43:03 +0200
thanks for the input.
nope, its dyed glass, I know coated glass from both objectives and stuff my g/f
does (she works with and buys different glass).
I have now calibrated a Scott 17" CRT and the result seems pleasing (the
correction curves however are also not that extreme as on my TFT). Clearly I
removed the filter.
They are at
http://rockbrew.com/argyll
again.
I cannot say whether the result is objectively good, but to my eye it seems
pleasing.
As all measurements on TFTs (except the really bad one) resulted in strange
outcomes, it's either the filter (I still cannot imagine the glass to change
that much over a few years) or some other kind of problem in the
TFT+spyder2+argyll combination.
I am really wondering whether I should buy a new colorimeter as I somehow fear
the outcome will be the same.
Is there no way I can verify that the colorimeter's readings are somewhat
correct at least?
I've got a DSLR with prime lenses here, if that helps...
The verify report is also at my webspace.
However, I doubt that verifying probably bad readings with the same colorimeter
can really help in determining the problem...
Shall I try to do same with the uncalibrated display and see whether dE values
are lower? I think I'd need a flat .icc for this purpose..
-------- Original-Nachricht --------
> Datum: Mon, 12 Sep 2011 13:09:30 +0200
> Von: Harald Hugenschmidt <harald@xxxxxxxxxxxxxxxx>
> An: argyllcms@xxxxxxxxxxxxx
> Betreff: [argyllcms] Re: Wrong gamma / color rendition worse than before
> calibration
> hmm,
> if you are unlucky you just ruined your filter. there are to types of
> glass filtes: dyed glass und surface coated. the later are optically superior,
> these filters are coated by a thin metal film, deposited in a vacuum
> chamber. this film gives them their spectral properties. i you polish i
> properly
> and i looses i colour hue when looked from an angle chances are that you
> removed the filter layer. i test with a spectrophotometer would reveal the
> difference.
>
> harry
>
>
>
> Am 12.09.2011 um 11:08 schrieb Thomas Bartosik:
>
> > The Slovenian dealer seems to have a deal atm it seems:
> > http://www.tavija.si/10/cm_monitor.htm#tradein
> > staro za novo means old for new
> > (I have only had 1 semester of croatian and slovenian is quite a bit
> different.. I think it mostly says buy a new one instead of an old one and get
> 20 EUR + VAT resp. 40 EUR + VAT; think they don't say which make the old
> one has to be.. Graeme: Are you referring to the US rebate offer:
> > http://networkedblogs.com/mlVZj
> > ?
> >
> > Regarding the Spyder problems:
> > I removed the filter and took a look at it. Its a thin _glass_ plate, so
> I don't think it's too likely its optical properties change so much over
> time, but I may be wrong. It had some slight glass corrosion and I polished
> it and its totally clear again now. Still I don't think that really makes a
> difference.
> >
> > The "crushed blacks" topic that's currently being discussed on this list
> also affects me.
> > The solution mentioned in
> > http://www.argyllcms.com/doc/CrushedDisplyBlacks.html
> > however doesn't improve the situation that much.
> >
> > I might try to raise the black level as Xun Wang wrote but I guess this
> won't help in solving the magenta problems..
> >
> > Does anyone want to change a Spyder2 *with nicely polished filter* for a
> ColorMunki display? ;->
> >
> > Florian Höch wrote:
> >
> >> Am 09.09.2011 13:11, schrieb Thomas Bartosik:
> >>> So do you also think the problem lies within my spyder?
> >>>
> >>> I am definitely prepared to part with it if it isn't worth the money I
> >> paid for it.
> >>> https://shop.colourconfidence.com/colormunki/CM_Trade_Up_en.html
> >>> says
> >>> "Purchase ColorMunki between 01/09/08 and 31/12/08."
> >>> Is the offer really meant to be in 2011?
> >>
> >> This offer seems outdated, and probably concerns ColorMunki Create and
> >> Design/Photo (different devices!). Afaik there are currently four
> >> products sold under the ColorMunki brand, two of which are
> >> spectrometers, and two are colorimeters:
> >>
> >> - ColorMunki Create colorimeter (same as i1 Display 2)
> >> - ColorMunki Design and ColorMunki Photo spectrometers
> >> - ColorMunki Display colorimeter (this is what you want)
> >>
> >>> Do I understand correctly that I don't even have to send the spyder to
> >> them? ('cause this would more or less spoil the savings as I am in
> >> Austria..)
> >>>
> >>> Projector profiling also works out with Argyll?
> >>> Then I think that's going to be the device I have to get...
> >>>
> >>> th
> >>>
> >>> Graeme Gill wrote:
> >>>
> >>>> Thomas Bartosik wrote:
> >>>>
> >>>>> Guess I'll soon be buying a new colorimeter - preferably one that's
> >>>> future-proof i.e. WCG and LED backlight capable. Any suggestions?
> >> Should be
> >>>> cheap but give acceptable results - i.e. FAR better than the
> spyder...
> >>>>> Or I'll save on the colorimeter and get a Lenovo W notebook...
> >>>>
> >>>> ColorMunki Display, if you are prepared to trade lower price for
> longer
> >>>> measurement time.
> >>>> There is even a rebate at the moment if you are prepared to part with
> >> your
> >>>> Spyder.
> >>>>
> >>>> Graeme Gill.
> >>>>
> >>>
> >>
> >> --
> >> Florian Höch
> >>
> >>
> >
> > --
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> >
>
>
--
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