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Contrast ratio of Dell U2412M

Contrast ratio 415:1
Monitor model Dell U2412M
Submitted 14 Apr 2013 16:13 CEST, by 46.9.*.*
Camera model Canon EOS 20D
Processing remarks

Note: image file 2: suggested exposure time: 1/53 s (Set EV to -1.1)

Black
Screen photo
[open image]
Luminance 0.31 cd/m2
Luminance spread 0.13 cd/m2 (2 standard deviations)
Exposure value –2.47 stops   (aim for –2 to –3)
Exposure spread 0.63 stops
Area used for calculation 0.378 x 0.425
Camera settings Exposure time: 8   ISO: 100   F-number: 4
Focal length: 27.2 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 128 cd/m2
Luminance spread 15 cd/m2 (2 standard deviations)
Exposure value –1.42 stops   (aim for –2 to –3)
Exposure spread 0.17 stops
Area used for calculation 0.378 x 0.425
Camera settings Exposure time: 1/25   ISO: 100   F-number: 4
Focal length: 27.2 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.