Contrast ratio of viewsonic vx2255wmb

Contrast ratio 698:1
Monitor model viewsonic vx2255wmb
Submitted 04 Mar 2010 20:20 CET, by 212.123.*.*
Camera model Sony DSC-S90
Processing remarks


Black
Screen photo
Luminance 0.24 cd/m2
Luminance spread 0.04 cd/m2 (2 standard deviations)
Exposure value –1.78 stops   (aim for –2 to –3)
Exposure spread 0.23 stops
Area used for calculation 0.558 x 0.558
Camera settings Exposure time: 2   ISO: 400   F-number: 2.8
Focal length: 38.6 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 170 cd/m2
Luminance spread 39 cd/m2 (2 standard deviations)
Exposure value –1.98 stops   (aim for –2 to –3)
Exposure spread 0.33 stops
Area used for calculation 0.558 x 0.558
Camera settings Exposure time: 1/400   ISO: 400   F-number: 2.8
Focal length: 38.6 mm   (35 mm equivalent)
Exposure compensation: 0
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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.