Contrast ratio results

Contrast ratio 349239:1
Monitor model
Submitted 15 Jul 2022 23:58 CEST, by 187.21.*.*
Camera model samsung SM-F415F
Processing remarks

Warning: image file 1: automatic white balance can cause inaccuracies.
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 2897.8 s (Set EV to +11.7)
Warning: image file 2: automatic white balance can cause inaccuracies.
Note: image file 2: suggested exposure time: 0.3 s (Set EV to -1.9)
Warning: Image ISO settings are not the same.

Black
Screen photo
Luminance 0 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –14.15 stops   (aim for –2 to –3)
Exposure spread 1.18 stops
Area used for calculation 0.281 x 0.133
Camera settings Exposure time: 0.9   ISO: 1600   F-number: 2.2
Focal length: 13 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 6 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –0.59 stops   (aim for –2 to –3)
Exposure spread 0.04 stops
Area used for calculation 0.184 x 0.195
Camera settings Exposure time: 1   ISO: 50   F-number: 2.2
Focal length: 13 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.