Contrast ratio results for Samsung Odyssey G7

Contrast ratio 31363:1
Monitor model Samsung Odyssey G7
Submitted 20 Nov 2020 16:49 CET, by 31.167.*.*
Camera model Apple iPhone 11
Processing remarks

Warning: Image ISO settings are not the same.

Black
Screen photo
Luminance 0.04 cd/m2
Luminance spread 0.05 cd/m2 (2 standard deviations)
Exposure value –3.4 stops   (aim for –2 to –3)
Exposure spread 1.78 stops
Area used for calculation 0.337 x 0.497
Camera settings Exposure time: 1   ISO: 640   F-number: 1.8
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 1289 cd/m2
Luminance spread 237 cd/m2 (2 standard deviations)
Exposure value –1.24 stops   (aim for –2 to –3)
Exposure spread 0.27 stops
Area used for calculation 0.338 x 0.489
Camera settings Exposure time: 1/351   ISO: 32   F-number: 1.8
Focal length: 26 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.