Contrast ratio results for LG 32GK850G-B

Contrast ratio 141756:1
Monitor model LG 32GK850G-B
Submitted 14 Apr 2019 03:49 CEST, by 69.9.*.*
Camera model Nikon D7200
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: 97.3 s (Set EV to +14.9)
Warning: image file 2: automatic white balance can cause inaccuracies.
Warning: image file 2: Overexposed. Please decrease the shutter time.
Warning: image file 3: automatic white balance can cause inaccuracies.
Warning: image file 3: Overexposed. Please decrease the shutter time.
Warning: image file 3 is too bright to be a dark photo. Maybe you mixed up the files?

Black
Screen photo
Luminance 0 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –17.43 stops   (aim for –2 to –3)
Exposure spread 1.13 stops
Area used for calculation 0.723 x 0.811
Camera settings Exposure time: 1/320   ISO: 400   F-number: 1.8
Focal length: 52 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 178 cd/m2
Luminance spread 32 cd/m2 (2 standard deviations)
Exposure value –0.31 stops   (aim for –2 to –3)
Exposure spread 0.26 stops
Area used for calculation 0.723 x 0.811
Camera settings Exposure time: 1/320   ISO: 400   F-number: 1.8
Focal length: 52 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
Luminance 179 cd/m2
Luminance spread 31 cd/m2 (2 standard deviations)
Exposure value –0.31 stops   (aim for –2 to –3)
Exposure spread 0.25 stops
Area used for calculation 0.723 x 0.811
Camera settings Exposure time: 1/320   ISO: 400   F-number: 1.8
Focal length: 52 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.