Contrast ratio results

Contrast ratio 1532:1
Monitor model
Submitted 05 Apr 2009 23:51 CEST, by 193.11.*.*
Camera model Canon PowerShot A710 IS
Processing remarks

Warning: Image ISO settings are not the same.

Black
Screen photo
Luminance 0.07 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –2.88 stops   (aim for –2 to –3)
Exposure spread 0.28 stops
Area used for calculation 0.495 x 0.495
Camera settings Exposure time: 6   ISO: 210   F-number: 2.8
Focal length: 34.3 mm   (35 mm equivalent)
Exposure compensation: 2
White
Screen photo
Luminance 110 cd/m2
Luminance spread 10 cd/m2 (2 standard deviations)
Exposure value –2.58 stops   (aim for –2 to –3)
Exposure spread 0.13 stops
Area used for calculation 0.495 x 0.495
Camera settings Exposure time: 1/403   ISO: 408   F-number: 2.8
Focal length: 34.3 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.