Contrast ratio results for Dell U2410

Contrast ratio 1130:1 (edge: 1077:1)
Monitor model Dell U2410
Submitted 24 Nov 2012 16:53 CET, by 188.221.*.*
Camera model Canon EOS 7D
Processing remarks

Warning: image file 1: automatic white balance can cause inaccuracies.
Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.
Warning: image file 2: automatic white balance can cause inaccuracies.
Warning: image file 3: automatic white balance can cause inaccuracies.

Black
Screen photo
Luminance 0.22 cd/m2
Luminance spread 0.05 cd/m2 (2 standard deviations)
Exposure value –2.91 stops   (aim for –2 to –3)
Exposure spread 0.31 stops
Area used for calculation 0.371 x 0.417
Camera settings Exposure time: 1   ISO: 400   F-number: 2.8
Focal length: 26.7 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 253 cd/m2
Luminance spread 47 cd/m2 (2 standard deviations)
Exposure value –2.14 stops   (aim for –2 to –3)
Exposure spread 0.27 stops
Area used for calculation 0.371 x 0.417
Camera settings Exposure time: 1/664   ISO: 400   F-number: 2.8
Focal length: 26.7 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
Luminance 0.23 cd/m2
Luminance spread 0.04 cd/m2 (2 standard deviations)
Exposure value –2.84 stops   (aim for –2 to –3)
Exposure spread 0.26 stops
Area used for calculation 0.371 x 0.417
Camera settings Exposure time: 1   ISO: 400   F-number: 2.8
Focal length: 26.7 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.