Contrast ratio results

Contrast ratio 56:1
Monitor model
Submitted 01 May 2023 20:14 CEST, by 112.198.*.*
Camera model samsung SM-G998B
Processing remarks

Warning: image file 2: Overexposed. Please decrease the shutter time.
Note: image file 2: suggested exposure time: 1/110 s (Set EV to -2.5)

Black
Screen photo
Luminance 0.24 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –1.5 stops   (aim for –2 to –3)
Exposure spread 0.06 stops
Area used for calculation 0.392 x 0.294
Camera settings Exposure time: 1   ISO: 400   F-number: 1.8
Focal length: 24 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 14 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –0.01 stops   (aim for –2 to –3)
Exposure spread 0 stops
Area used for calculation 0.392 x 0.294
Camera settings Exposure time: 1/20   ISO: 400   F-number: 1.8
Focal length: 24 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.