Contrast ratio results

Contrast ratio 10857:1
Monitor model
Submitted 01 Jan 2022 15:19 CET, by 122.139.*.*
Camera model samsung SM-G9550
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 38.4 s (Set EV to +10.9)
image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: image file 2: Overexposed. Please decrease the shutter time.
Note: image file 2: suggested exposure time: 1/280 s (Set EV to -2.5)

Black
Screen photo
Luminance 0 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –13.41 stops   (aim for –2 to –3)
Exposure spread 1.5 stops
Area used for calculation 0.613 x 0.259
Camera settings Exposure time: 1/50   ISO: 400   F-number: 1.7
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 31 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –-0 stops   (aim for –2 to –3)
Exposure spread 0 stops
Area used for calculation 0.345 x 0.46
Camera settings Exposure time: 1/50   ISO: 400   F-number: 1.7
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.