Contrast ratio results for LG 24MK(BK/MN)400H(430H/43T)

Contrast ratio 334:1
Monitor model LG 24MK(BK/MN)400H(430H/43T)
Submitted 08 Jan 2022 16:53 CET, by 98.156.*.*
Camera model Google Pixel 4 XL
Processing remarks

Warning: image file 1: automatic white balance can cause inaccuracies.
Warning: image file 2: automatic white balance can cause inaccuracies.
Note: image file 2: suggested exposure time: 1/130 s (Set EV to -1.8)
Warning: image file 3: automatic white balance can cause inaccuracies.
image file 3: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
Warning: Image ISO settings are not the same.
Warning: image file 3 is too bright to be a dark photo. Maybe you mixed up the files?

Black
Screen photo
Luminance 0.27 cd/m2
Luminance spread 0.22 cd/m2 (2 standard deviations)
Exposure value –2.23 stops   (aim for –2 to –3)
Exposure spread 1.22 stops
Area used for calculation 0.385 x 0.4
Camera settings Exposure time: 1/15   ISO: 2920   F-number: 1.7
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 91 cd/m2
Luminance spread 11 cd/m2 (2 standard deviations)
Exposure value –0.7 stops   (aim for –2 to –3)
Exposure spread 0.18 stops
Area used for calculation 0.378 x 0.414
Camera settings Exposure time: 1/38   ISO: 64   F-number: 1.7
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
Luminance 16 cd/m2
Luminance spread 44 cd/m2 (2 standard deviations)
Exposure value –2.24 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.39 x 0.39
Camera settings Exposure time: 1/55   ISO: 175   F-number: 1.7
Focal length: 27 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.