Contrast ratio of dell u2311

Contrast ratio 1:1
Monitor model dell u2311
Submitted 06 Apr 2011 19:58 CEST, by 212.52.*.*
Camera model Pentax K10D
Processing remarks


Black
Screen photo
Luminance 78 cd/m2
Luminance spread 16 cd/m2 (2 standard deviations)
Exposure value –1.55 stops   (aim for –2 to –3)
Exposure spread 0.29 stops
Area used for calculation 0.375 x 0.422
Camera settings Exposure time: 1/350   ISO: 1   F-number: 3.5
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 84 cd/m2
Luminance spread 7 cd/m2 (2 standard deviations)
Exposure value –0.97 stops   (aim for –2 to –3)
Exposure spread 0.13 stops
Area used for calculation 0.375 x 0.422
Camera settings Exposure time: 1/250   ISO: 1   F-number: 3.5
Focal length: 27 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.