Contrast ratio results for BenQ XL2411P

Contrast ratio 4.6587e+07:1
Monitor model BenQ XL2411P
Submitted 09 Dec 2019 15:02 CET, by 83.245.*.*
Camera model HUAWEI COR-L29
Processing remarks

Warning: image file 1: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.
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: 1/120 s (Set EV to +23.0)
Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.
Warning: image file 2: automatic white balance can cause inaccuracies.
Warning: image file 2: Overexposed. Please decrease the shutter time.
Warning: image file 3: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.
Warning: image file 3 is too bright to be a dark photo. Maybe you mixed up the files?

Black
Screen photo
Luminance 89 cd/m2
Luminance spread 9320 cd/m2 (2 standard deviations)
Exposure value –25.47 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.39 x 0.39
Camera settings Exposure time: 1/99996336   ISO: 100   F-number: 2.2
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 4.13805e+09 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 0.39 x 0.39
Camera settings Exposure time: 1/99996336   ISO: 100   F-number: 2.2
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
Luminance 1.55096e+09 cd/m2
Luminance spread 2.72193e+09 cd/m2 (2 standard deviations)
Exposure value –1.42 stops   (aim for –2 to –3)
Exposure spread 3.94 stops
Area used for calculation 0.415 x 0.355
Camera settings Exposure time: 1/99996336   ISO: 100   F-number: 2.2
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.