Contrast ratio results for BENQ

Contrast ratio 265:1
Monitor model BENQ
Submitted 09 Jan 2021 03:10 CET, by 95.249.*.*
Camera model Xiaomi Redmi Note 7
Processing remarks

Warning: image file 1: could not determine angle of view; assuming 38 mm lens (35 mm equivalent).
image file 1: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
Warning: image file 2: could not determine angle of view; assuming 38 mm lens (35 mm equivalent).
image file 2: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
Warning: image file 2: Overexposed. Please decrease the shutter time.
Warning: Image ISO settings are not the same.

Black
Screen photo
Luminance 1.01 cd/m2
Luminance spread 0.14 cd/m2 (2 standard deviations)
Exposure value –1.79 stops   (aim for –2 to –3)
Exposure spread 0.19 stops
Area used for calculation 0.528 x 0.528
Camera settings Exposure time: 1/15   ISO: 1180   F-number: 1.8
Focal length: 0 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 268 cd/m2
Luminance spread 25 cd/m2 (2 standard deviations)
Exposure value –0.51 stops   (aim for –2 to –3)
Exposure spread 0.14 stops
Area used for calculation 0.528 x 0.528
Camera settings Exposure time: 1/138   ISO: 100   F-number: 1.8
Focal length: 0 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.