Whither a PB LCD (was Repetitive Calibration)
Whither a PB LCD (was Repetitive Calibration)
- Subject: Whither a PB LCD (was Repetitive Calibration)
- From: "Anthony Sanna" <email@hidden>
- Date: Mon, 20 Jan 2003 11:07:48 -0600
>
If you Precalibrate to 80 can. m/s, then set a white point other than native
>
in OptiCAL, OptiCAL will force one or two of the guns to lower levels to
>
balance the white point... lowering your total luminance.
I always wondered why, if I set a white-point of 6500 in PreCal and
adjusted the guns to 000.00 ?uv, and the luminance to 95cd/m2, that after
running OptiCal (again setting the white point to 6500), that I could
never hit my target luminance of 95cd/m2. It would always be something
like 92.3 cd/m2. Now I always shoot for a slightly higher luminance in
PreCal, such as 98cd/m2, so that the OptiCal luminance will give me
enough wiggle-room to hit the mark with the contrast control.
This aside.... I have a new question for the list.
I bought a PhotoCal/LCD Spyder bundle to handle some less-critical LCD
calibrations. I've got a number of iMacs, iBooks and TiPB's to profile,
and when I started on a TiPB last night, I found myself stuck on several
questions as to the procedure.
Basically, all of these computers have no monitor color controls. Am I
correct on this? There is a brightness slider, but no way to set the
white point or gamma, other than by running through Apple's "Calibrate"
routine, which, in the end, creates a profile that you intend to replace
anyway. Am I still on the mark?
When you start up PhotoCal it asks you to select CRT or LCD. Fine. I
can do that. Then it asks you for white point and gamma choices. What
do you select here? What you want? ...or what you think the monitor is?
I entered 2.2 and 6500, but the resulting profile was very dark. I
don't have PhotoCal here at the office to double-check the routine, but
does anyone have "THE" way to profile these displays?
Thanks
Tony
--
Anthony R. Sanna
SACO Foods, Inc.
6120 University Avenue
Middleton, WI 53562
1-800-373-7226
email@hidden
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