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Contrast ratio results for nec 20wgx2 pro

Contrast ratio 1905:1
Monitor model nec 20wgx2 pro
Submitted 16 Jul 2009 22:22 CEST, by 85.202.*.*
Camera model Canon PowerShot G7
Processing remarks

image file 3: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: image file 3 is too bright to be a dark photo. Maybe you mixed up the files?

Black
Screen photo
[open image]
Luminance 0.15 cd/m2
Luminance spread 0.06 cd/m2 (2 standard deviations)
Exposure value –3.43 stops   (aim for –2 to –3)
Exposure spread 0.54 stops
Area used for calculation 0.495 x 0.495
Camera settings Exposure time: 1.6   ISO: 408   F-number: 3.5
Focal length: 34.3 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 284 cd/m2
Luminance spread 20 cd/m2 (2 standard deviations)
Exposure value –1.86 stops   (aim for –2 to –3)
Exposure spread 0.1 stops
Area used for calculation 0.495 x 0.495
Camera settings Exposure time: 1/403   ISO: 408   F-number: 3.5
Focal length: 34.3 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 154 cd/m2
Luminance spread 264 cd/m2 (2 standard deviations)
Exposure value –1.75 stops   (aim for –2 to –3)
Exposure spread 3.7 stops
Area used for calculation 0.495 x 0.495
Camera settings Exposure time: 1/202   ISO: 408   F-number: 3.5
Focal length: 34.3 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.