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Contrast ratio of Lenovo L220x

Contrast ratio 688:1
Monitor model Lenovo L220x
Submitted 04 Aug 2010 01:36 CEST, by 213.152.*.*
Camera model Nikon D5000
Processing remarks


Black
Screen photo
[open image]
Luminance 0.2 cd/m2
Luminance spread 0.04 cd/m2 (2 standard deviations)
Exposure value –1.78 stops   (aim for –2 to –3)
Exposure spread 0.31 stops
Area used for calculation 0.721 x 0.815
Camera settings Exposure time: 1   ISO: 400   F-number: 1.8
Focal length: 52 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 139 cd/m2
Luminance spread 36 cd/m2 (2 standard deviations)
Exposure value –1 stops   (aim for –2 to –3)
Exposure spread 0.38 stops
Area used for calculation 0.721 x 0.815
Camera settings Exposure time: 1/400   ISO: 400   F-number: 1.8
Focal length: 52 mm   (35 mm equivalent)
Exposure compensation: 0
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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.