Being a few thousand miles off the beaten path of professional calibrators, I have to be self reliant when it comes to calibrating my Lumis. So off I went and bought a CalMAN with EyeOne Pro, learned how to use it and did some preliminary measurements. I would like to run these measurements by you to benefit from your feedback.
I set dynamic black ON with iris in mid position (50), chose D65 and EN5 gamma correction setting. The room is light controlled and the screen is 1.0 gain 16:9 180" diagonal (13' wide). The light meter read 40 hours. Both brightness and contrast were set as per instruction resulting in brightness at 47 and contrast at 60 settings.
First I was curious in how well the Lumis fared with such a large screen, so on I put 100%W window and measured off the screen at different lamp power settings (remember, at mid iris setting):
Lamp Power ftL reading Area x ftL
----------- ---------- ---------
230 W 11.2 1075
240 W 11.8 1135
250 W 12.6 1210
260 W 13.3 1280
270 W 14.1 1355
280 W 14.9 1430
From then on, all measurements were taken at 260W. Attached are snapshots of the measurement screens. The test patterns used were from AVCHD Blu-Ray burned on a DVD.
Am I doing something wrong or is my Lumis in desperate need for calibration? For some reason, the meter is oblivious to the 75% Red (Delta E = 117!!!). It did measure the red OK however at the EN4 setting (with delta E = 4.7, other colors readings were unchanged).
By the way, should I have switched off the dynamic black before taking measurements?