Contrast ratio results

Contrast ratio 1557:1
Monitor model
Submitted 03 Aug 2021 01:59 CEST, by 77.78.*.*
Camera model Canon PowerShot SX160 IS
Processing remarks

Warning: Image F-number settings are not the same.

Black
Screen photo
Luminance 0.16 cd/m2
Luminance spread 0.08 cd/m2 (2 standard deviations)
Exposure value –2.76 stops   (aim for –2 to –3)
Exposure spread 0.73 stops
Area used for calculation 0.406 x 0.406
Camera settings Exposure time: 12.9   ISO: 400   F-number: 8
Focal length: 28.1 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 244 cd/m2
Luminance spread 47 cd/m2 (2 standard deviations)
Exposure value –2.11 stops   (aim for –2 to –3)
Exposure spread 0.28 stops
Area used for calculation 0.406 x 0.406
Camera settings Exposure time: 1/403   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.