Contrast ratio results

Contrast ratio 366:1
Monitor model
Submitted 26 Mar 2021 23:55 CET, by 213.149.*.*
Camera model samsung SM-G920F
Processing remarks

Warning: image file 1: automatic white balance can cause inaccuracies.
Warning: image file 1: Overexposed. Please decrease the shutter time.
Note: image file 1: suggested exposure time: 0.3 s (Set EV to -1.6)
Warning: image file 2: automatic white balance can cause inaccuracies.

Black
Screen photo
Luminance 0.42 cd/m2
Luminance spread 0.46 cd/m2 (2 standard deviations)
Exposure value –0.87 stops   (aim for –2 to –3)
Exposure spread 1.75 stops
Area used for calculation 0.458 x 0.343
Camera settings Exposure time: 1   ISO: 400   F-number: 1.9
Focal length: 28 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 155 cd/m2
Luminance spread 7 cd/m2 (2 standard deviations)
Exposure value –0.8 stops   (aim for –2 to –3)
Exposure spread 0.07 stops
Area used for calculation 0.458 x 0.343
Camera settings Exposure time: 1/350   ISO: 400   F-number: 1.9
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.