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Contrast ratio results for LG 25um58

Contrast ratio 766:1
Monitor model LG 25um58
Submitted 03 Feb 2024 06:55 CET, by 200.73.*.*
Camera model Nikon D7500
Processing remarks

Note: image file 1: suggested exposure time: 2.4 s (Set EV to +1.3)
Warning: Image ISO settings are not the same.

Black
Screen photo
[open image]
Luminance 0.24 cd/m2
Luminance spread 0.23 cd/m2 (2 standard deviations)
Exposure value –3.79 stops   (aim for –2 to –3)
Exposure spread 1.47 stops
Area used for calculation 0.292 x 0.328
Camera settings Exposure time: 1   ISO: 200   F-number: 2.8
Focal length: 21 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 186 cd/m2
Luminance spread 19 cd/m2 (2 standard deviations)
Exposure value –2.18 stops   (aim for –2 to –3)
Exposure spread 0.15 stops
Area used for calculation 0.292 x 0.328
Camera settings Exposure time: 1/500   ISO: 400   F-number: 2.8
Focal length: 21 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.