Contrast ratio of Acer AL2216W

Contrast ratio 636:1
Monitor model Acer AL2216W
Submitted 21 Dec 2009 17:03 CET, by 68.214.*.*
Camera model Nikon D90
Processing remarks


Black
Screen photo
Luminance 0.16 cd/m2
Luminance spread 0.03 cd/m2 (2 standard deviations)
Exposure value –2.48 stops   (aim for –2 to –3)
Exposure spread 0.27 stops
Area used for calculation 0.375 x 0.423
Camera settings Exposure time: 3   ISO: 400   F-number: 3.5
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 99 cd/m2
Luminance spread 11 cd/m2 (2 standard deviations)
Exposure value –3.4 stops   (aim for –2 to –3)
Exposure spread 0.16 stops
Area used for calculation 0.375 x 0.423
Camera settings Exposure time: 1/400   ISO: 400   F-number: 3.5
Focal length: 27 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.