Contrast ratio results

Contrast ratio 666:1
Monitor model
Submitted 24 Nov 2018 17:47 CET, by 86.120.*.*
Camera model Google ONEPLUS A6003
Processing remarks

Warning: image file 1: automatic white balance can cause inaccuracies.
Warning: image file 2: automatic white balance can cause inaccuracies.
Note: image file 2: suggested exposure time: 1/250 s (Set EV to -1.3)
Warning: Image ISO settings are not the same.

Black
Screen photo
Luminance 0.02 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –3.5 stops   (aim for –2 to –3)
Exposure spread 1.8 stops
Area used for calculation 0.371 x 0.495
Camera settings Exposure time: 1/6   ISO: 6510   F-number: 1.7
Focal length: 28 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 13 cd/m2
Luminance spread 5 cd/m2 (2 standard deviations)
Exposure value –1.18 stops   (aim for –2 to –3)
Exposure spread 0.53 stops
Area used for calculation 0.371 x 0.495
Camera settings Exposure time: 1/100   ISO: 812   F-number: 1.7
Focal length: 28 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.