Contrast ratio of Dell

Contrast ratio 695:1
Monitor model Dell
Submitted 11 Jul 2012 20:18 CEST, by 173.12.*.*
Camera model Canon EOS 50D
Processing remarks


Black
Screen photo
Luminance 0.25 cd/m2
Luminance spread 0.12 cd/m2 (2 standard deviations)
Exposure value –2.52 stops   (aim for –2 to –3)
Exposure spread 0.7 stops
Area used for calculation 0.44 x 0.495
Camera settings Exposure time: 3.2   ISO: 400   F-number: 4.6
Focal length: 31.7 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 172 cd/m2
Luminance spread 104 cd/m2 (2 standard deviations)
Exposure value –1.75 stops   (aim for –2 to –3)
Exposure spread 0.91 stops
Area used for calculation 0.44 x 0.495
Camera settings Exposure time: 1/128   ISO: 400   F-number: 4.6
Focal length: 31.7 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.