Contrast ratio of NEC 20WGX2

Contrast ratio 549:1
Monitor model NEC 20WGX2
Submitted 13 Apr 2009 09:02 CEST, by 217.114.*.*
Camera model Canon PowerShot A570 IS
Processing remarks


Black
Screen photo
Luminance 0.31 cd/m2
Luminance spread 0.09 cd/m2 (2 standard deviations)
Exposure value –3.21 stops   (aim for –2 to –3)
Exposure spread 0.44 stops
Area used for calculation 0.495 x 0.495
Camera settings Exposure time: 1   ISO: 200   F-number: 2.6
Focal length: 34.3 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 172 cd/m2
Luminance spread 13 cd/m2 (2 standard deviations)
Exposure value –2.08 stops   (aim for –2 to –3)
Exposure spread 0.11 stops
Area used for calculation 0.495 x 0.495
Camera settings Exposure time: 1/251   ISO: 200   F-number: 2.6
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.