Contrast ratio results

Contrast ratio 747:1
Monitor model
Submitted 23 Mar 2020 11:50 CET, by 93.139.*.*
Camera model OnePlus GM1900
Processing remarks

Note: image file 1: suggested exposure time: 0.9 s (Set EV to +inf)

Black
Screen photo
Luminance 0.12 cd/m2
Luminance spread 0.06 cd/m2 (2 standard deviations)
Exposure value –1.42 stops   (aim for –2 to –3)
Exposure spread 0.81 stops
Area used for calculation 0.343 x 0.564
Camera settings Exposure time: 2   ISO: 400   F-number: 1.7
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 86 cd/m2
Luminance spread 23 cd/m2 (2 standard deviations)
Exposure value –1.52 stops   (aim for –2 to –3)
Exposure spread 0.39 stops
Area used for calculation 0.343 x 0.564
Camera settings Exposure time: 1/400   ISO: 400   F-number: 1.7
Focal length: 27 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.