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Contrast ratio results for NEC MultiSync 20WGX2

Contrast ratio 646:1 (edge: 869:1)
Monitor model NEC MultiSync 20WGX2
Submitted 13 Jan 2012 21:42 CET, by 217.118.*.*
Camera model Panasonic DMC-TZ7
Processing remarks

Note: image file 1: suggested exposure time: 1.8 s (Set EV to +0.9)
Note: image file 3: suggested exposure time: 2.5 s (Set EV to +1.0)
Warning: Image ISO settings are not the same.

Black
Screen photo
[open image]
Luminance 0.22 cd/m2
Luminance spread 0.06 cd/m2 (2 standard deviations)
Exposure value –3.7 stops   (aim for –2 to –3)
Exposure spread 0.42 stops
Area used for calculation 0.361 x 0.361
Camera settings Exposure time: 0.8   ISO: 400   F-number: 3.3
Focal length: 25 mm   (35 mm equivalent)
Exposure compensation: -0.33
White
Screen photo
[open image]
Luminance 145 cd/m2
Luminance spread 11 cd/m2 (2 standard deviations)
Exposure value –2.01 stops   (aim for –2 to –3)
Exposure spread 0.11 stops
Area used for calculation 0.361 x 0.361
Camera settings Exposure time: 1/50   ISO: 80   F-number: 3.3
Focal length: 25 mm   (35 mm equivalent)
Exposure compensation: -0.33
Black at screen edge
Screen photo
[open image]
Luminance 0.17 cd/m2
Luminance spread 0.04 cd/m2 (2 standard deviations)
Exposure value –3.81 stops   (aim for –2 to –3)
Exposure spread 0.31 stops
Area used for calculation 0.361 x 0.361
Camera settings Exposure time: 1   ISO: 400   F-number: 3.3
Focal length: 25 mm   (35 mm equivalent)
Exposure compensation: -0.33

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.