Contrast ratio of Dell 20"

Contrast ratio 303:1
Monitor model Dell 20"
Submitted 10 Jan 2009 19:34 CET, by 84.217.*.*
Camera model Canon EOS DIGITAL REBEL XTi
Processing remarks


Black
Screen photo
Luminance 0.37 cd/m2
Luminance spread 0.09 cd/m2 (2 standard deviations)
Exposure value –2.82 stops   (aim for –2 to –3)
Exposure spread 0.37 stops
Area used for calculation 0.39 x 0.44
Camera settings Exposure time: 0.5   ISO: 800   F-number: 3.5
Focal length: 28.1 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 112 cd/m2
Luminance spread 25 cd/m2 (2 standard deviations)
Exposure value –2.54 stops   (aim for –2 to –3)
Exposure spread 0.32 stops
Area used for calculation 0.39 x 0.44
Camera settings Exposure time: 1/500   ISO: 800   F-number: 3.5
Focal length: 28.1 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.