Contrast ratio of NEC EA231wmi

Contrast ratio 817:1
Monitor model NEC EA231wmi
Submitted 16 Jan 2010 18:08 CET, by 87.14.*.*
Camera model Canon EOS 350D DIGITAL
Processing remarks


Black
Screen photo
Luminance 0.09 cd/m2
Luminance spread 0.03 cd/m2 (2 standard deviations)
Exposure value –3.25 stops   (aim for –2 to –3)
Exposure spread 0.46 stops
Area used for calculation 0.651 x 0.733
Camera settings Exposure time: 4   ISO: 400   F-number: 4
Focal length: 46.9 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 73 cd/m2
Luminance spread 20 cd/m2 (2 standard deviations)
Exposure value –2.9 stops   (aim for –2 to –3)
Exposure spread 0.4 stops
Area used for calculation 0.651 x 0.733
Camera settings Exposure time: 1/160   ISO: 400   F-number: 4
Focal length: 46.9 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.