Contrast ratio results

Contrast ratio 605:1
Monitor model
Submitted 24 Dec 2009 14:35 CET, by 86.128.*.*
Camera model Canon PowerShot SX110 IS
Processing remarks


Black
Screen photo
Luminance 0.21 cd/m2
Luminance spread 0.12 cd/m2 (2 standard deviations)
Exposure value –3.3 stops   (aim for –2 to –3)
Exposure spread 0.82 stops
Area used for calculation 0.504 x 0.504
Camera settings Exposure time: 4   ISO: 80   F-number: 2.8
Focal length: 34.9 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 129 cd/m2
Luminance spread 15 cd/m2 (2 standard deviations)
Exposure value –1.7 stops   (aim for –2 to –3)
Exposure spread 0.17 stops
Area used for calculation 0.504 x 0.504
Camera settings Exposure time: 1/50   ISO: 80   F-number: 2.8
Focal length: 34.9 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.