Contrast ratio results for BenQ XL2411P

Contrast ratio 54:1 (edge: 69:1)
Monitor model BenQ XL2411P
Submitted 09 Dec 2019 15:09 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: Underexposed. Please increase the shutter time.
Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.
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: Underexposed. Please increase the shutter time.

Black
Screen photo
Luminance 5.91488e+07 cd/m2
Luminance spread 3.86432e+07 cd/m2 (2 standard deviations)
Exposure value –6.13 stops   (aim for –2 to –3)
Exposure spread 0.98 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 3.22271e+09 cd/m2
Luminance spread 4.32058e+08 cd/m2 (2 standard deviations)
Exposure value –0.36 stops   (aim for –2 to –3)
Exposure spread 0.19 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 4.70016e+07 cd/m2
Luminance spread 2.1942e+07 cd/m2 (2 standard deviations)
Exposure value –6.46 stops   (aim for –2 to –3)
Exposure spread 0.69 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

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.