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Contrast ratio results for NEC EA231WMi

Contrast ratio 1.00804e+08:1
Monitor model NEC EA231WMi
Submitted 12 Feb 2011 14:57 CET, by 207.119.*.*
Camera model Canon EOS REBEL T2i
Processing remarks

Warning: image file 1: camera was zoomed out too much.
Warning: image file 1: automatic white balance can cause inaccuracies.
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 190426.2 s (Set EV to +26.2)
Warning: image file 2: camera was zoomed out too much.
Warning: image file 2: automatic white balance can cause inaccuracies.
Warning: image file 3: camera was zoomed out too much.
Warning: image file 3: automatic white balance can cause inaccuracies.
image file 3: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: image file 3: Underexposed. Please increase the shutter time.
Note: image file 3: suggested exposure time: 1/120 s (Set EV to +1.7)
Warning: image file 3 is too bright to be a dark photo. Maybe you mixed up the files?

Black
Screen photo
[open image]
Luminance 0 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –28.66 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.1 x 0.113
Camera settings Exposure time: 1/395   ISO: 400   F-number: 3.5
Focal length: 1.4 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 245 cd/m2
Luminance spread 15 cd/m2 (2 standard deviations)
Exposure value –2.08 stops   (aim for –2 to –3)
Exposure spread 0.09 stops
Area used for calculation 0.1 x 0.113
Camera settings Exposure time: 1/395   ISO: 400   F-number: 3.5
Focal length: 1.4 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 56 cd/m2
Luminance spread 102 cd/m2 (2 standard deviations)
Exposure value –4.2 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.1 x 0.113
Camera settings Exposure time: 1/395   ISO: 400   F-number: 3.5
Focal length: 1.4 mm   (35 mm equivalent)
Exposure compensation: 0

The luminance values in cd/m2 are not very reliable, since camera sensitivities can easily differ up to 50% from their nominal value. Typically, the real luminance is 30% lower than this number. The area used for calculation is chosen such that it corresponds to a viewing angle of ±14° horizontally and ±10.5° vertically, which is equivalent to viewing the screen from a distance of about 1.5 times the diagonal size.

Unfortunately, there is a lot of variation in how cameras use EXIF settings. If photos from your camera your produce unusable results, try coming back in a few days. I review submitted pictures regularly and try to fix problems.