Contrast ratio results

Contrast ratio 1239:1
Monitor model
Submitted 11 Jan 2018 22:54 CET, by 77.78.*.*
Camera model Canon PowerShot SX160 IS
Processing remarks


Black
Screen photo
Luminance 0.06 cd/m2
Luminance spread 0.06 cd/m2 (2 standard deviations)
Exposure value –2.4 stops   (aim for –2 to –3)
Exposure spread 1.52 stops
Area used for calculation 0.406 x 0.406
Camera settings Exposure time: 8   ISO: 400   F-number: 3.5
Focal length: 28.1 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 77 cd/m2
Luminance spread 5 cd/m2 (2 standard deviations)
Exposure value –2.09 stops   (aim for –2 to –3)
Exposure spread 0.1 stops
Area used for calculation 0.406 x 0.406
Camera settings Exposure time: 1/125   ISO: 400   F-number: 3.5
Focal length: 28.1 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.