RE: Issue with CRT/LCD Spyder and Optical 3.5
RE: Issue with CRT/LCD Spyder and Optical 3.5
- Subject: RE: Issue with CRT/LCD Spyder and Optical 3.5
- From: Dana Gregory <email@hidden>
- Date: Fri, 01 Feb 2002 07:52:21 -0500
This is an issue in OptiCAL 3.5 Mac that is fixed in 3.5.1 which is now up
on the ColorVision www site (www.colorcal.com) in Support->Software
Upgrades.
This only affects luminance readings in Precision mode when using a Spyder
and only occurs in the Macintosh version.
--
Dana Gregory 716 325-7050
ColorVision Inc. Technical Support
300 State Street #303 email@hidden
Rochester, New York 14614
http://www.colorcal.com
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Date: Tue, 29 Jan 2002 00:32:11 -0500
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Subject: Issue with CRT/LCD Spyder and Optical 3.5
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From: Terry Wyse <email@hidden>
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To: ColorSync User List <email@hidden>
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Hello all,
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Installed my first CRT/LCD Spyder and Optical 3.5 at a customer and had a
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weird problem with the way the luminence was being displayed.
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Since this was a CRT display (Viewsonic G810), I followed the instructions
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and pulled off the LCD filter and replaced it with the suction cup same as
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the old Spyders.
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In Precal, we went thru the normal routine and set a color temp of 6500K and
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adjusted the luminence to around 95 candelas. We then proceeded to Optical
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and selected a Gamma of 2.2 and used the NATIVE white point selection (this
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was a new but welcome option) since we had already set this correctly in
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Precal. When we got to the black point/white point readings, the values were
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whacked! I was reading something like .60 for black point. Thinking this
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could've been due to the high amount of ambient lighting (bright office
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fluorescent lighting which I couldn't do anything about), I turned the
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brightness to 0% but it was still reading near .50. So I moved on to the
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white point setting. Here it was "measuring" nearly 200 candelas! Since this
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was impossible and I did seem to get correct readings in Precal, I assume
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it's some sort of software glitch. So why the "correct" behavior in Precal
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but the whacky behavior in Optical (both installed from the same CD)?
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Any ideas?
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Terry
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_____________________________
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Terence L. Wyse
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Color Management Specialist
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All Systems Integration, Inc.
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http://www.allsystems.com
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email@hidden
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