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Contrast ratio results for LG L227WT

Contrast ratio 968:1
Monitor model LG L227WT
Submitted 14 Jun 2008 08:08 CEST, by 79.112.*.*
Camera model Hewlett-Packard HP PhotoSmart C945 V01.7
Processing remarks

Warning: Image ISO settings are not the same.

Black
Screen photo
[open image]
Luminance 0.22 cd/m2
Luminance spread 0.07 cd/m2 (2 standard deviations)
Exposure value –1.95 stops   (aim for –2 to –3)
Exposure spread 0.47 stops
Area used for calculation 0.752 x 0.749
Camera settings Exposure time: 8.4   ISO: 100   F-number: 2.9
Focal length: 52 mm   (35 mm equivalent)
Exposure compensation: 0.328
White
Screen photo
[open image]
Luminance 215 cd/m2
Luminance spread 46 cd/m2 (2 standard deviations)
Exposure value –1.91 stops   (aim for –2 to –3)
Exposure spread 0.31 stops
Area used for calculation 0.752 x 0.749
Camera settings Exposure time: 1/225   ISO: 200   F-number: 2.9
Focal length: 52 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.