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Contrast ratio results for Dell U2311H

Contrast ratio 971:1
Monitor model Dell U2311H
Submitted 19 Feb 2011 23:27 CET, by 77.78.*.*
Camera model Olympus SP350
Processing remarks

Warning: image file 1: automatic white balance can cause inaccuracies.
Note: image file 1: suggested exposure time: 1.2 s (Set EV to -1.4)
Warning: image file 2: automatic white balance can cause inaccuracies.

Black
Screen photo
[open image]
Luminance 0.24 cd/m2
Luminance spread 0.05 cd/m2 (2 standard deviations)
Exposure value –1.13 stops   (aim for –2 to –3)
Exposure spread 0.3 stops
Area used for calculation 0.55 x 0.55
Camera settings Exposure time: 3.2   ISO: 400   F-number: 2.8
Focal length: 38.1 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 232 cd/m2
Luminance spread 20 cd/m2 (2 standard deviations)
Exposure value –1.21 stops   (aim for –2 to –3)
Exposure spread 0.13 stops
Area used for calculation 0.55 x 0.55
Camera settings Exposure time: 1/320   ISO: 400   F-number: 2.8
Focal length: 38.1 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.