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Contrast ratio results for Acer/AL2223W

Contrast ratio 4895:1
Monitor model Acer/AL2223W
Submitted 19 Nov 2008 20:30 CET, by 12.152.*.*
Camera model Sony DSC-P200
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 9.5 s (Set EV to +11.9)

Black
Screen photo
[open image]
Luminance 0.03 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –14.39 stops   (aim for –2 to –3)
Exposure spread 1.07 stops
Area used for calculation 0.552 x 0.552
Camera settings Exposure time: 1/400   ISO: 400   F-number: 2.8
Focal length: 38.2 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 153 cd/m2
Luminance spread 60 cd/m2 (2 standard deviations)
Exposure value –2.13 stops   (aim for –2 to –3)
Exposure spread 0.57 stops
Area used for calculation 0.552 x 0.552
Camera settings Exposure time: 1/400   ISO: 400   F-number: 2.8
Focal length: 38.2 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.