Contrast ratio results for BenQ GW2780

Contrast ratio 76:1
Monitor model BenQ GW2780
Submitted 08 Jul 2020 17:58 CEST, by 77.115.*.*
Camera model Canon EOS 250D
Processing remarks

image file 3: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: Image focal lengths/zoom levels 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 2.98 cd/m2
Luminance spread 0.5 cd/m2 (2 standard deviations)
Exposure value –2.79 stops   (aim for –2 to –3)
Exposure spread 0.24 stops
Area used for calculation 0.537 x 0.605
Camera settings Exposure time: 1/6   ISO: 400   F-number: 4
Focal length: 38.7 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 226 cd/m2
Luminance spread 50 cd/m2 (2 standard deviations)
Exposure value –2.58 stops   (aim for –2 to –3)
Exposure spread 0.32 stops
Area used for calculation 0.537 x 0.605
Camera settings Exposure time: 1/395   ISO: 400   F-number: 4
Focal length: 38.7 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
Luminance 195 cd/m2
Luminance spread 371 cd/m2 (2 standard deviations)
Exposure value –1.79 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.515 x 0.58
Camera settings Exposure time: 1/197   ISO: 400   F-number: 4
Focal length: 37.1 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.