Contrast ratio results for HP ZR2740W

Contrast ratio 1989:1
Monitor model HP ZR2740W
Submitted 20 Aug 2022 22:18 CEST, by 81.183.*.*
Camera model Xiaomi M2011K2G
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 2.0 s (Set EV to +2.4)

Black
Screen photo
Luminance 0.07 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –4.85 stops   (aim for –2 to –3)
Exposure spread 0.23 stops
Area used for calculation 0.481 x 0.271
Camera settings Exposure time: 0.4   ISO: 320   F-number: 1.8
Focal length: 25 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 149 cd/m2
Luminance spread 3 cd/m2 (2 standard deviations)
Exposure value –1.54 stops   (aim for –2 to –3)
Exposure spread 0.03 stops
Area used for calculation 0.481 x 0.271
Camera settings Exposure time: 1/500   ISO: 320   F-number: 1.8
Focal length: 25 mm   (35 mm equivalent)
Exposure compensation: 0
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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.