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Contrast ratio results for LG 25UM56

Contrast ratio 603:1
Monitor model LG 25UM56
Submitted 24 Mar 2022 04:51 CET, by 152.169.*.*
Camera model samsung SM-G975U1
Processing remarks

Warning: image file 2: Overexposed. Please decrease the shutter time.

Black
Screen photo
[open image]
Luminance 0.34 cd/m2
Luminance spread 0.15 cd/m2 (2 standard deviations)
Exposure value –2.22 stops   (aim for –2 to –3)
Exposure spread 0.65 stops
Area used for calculation 0.376 x 0.376
Camera settings Exposure time: 0.3   ISO: 400   F-number: 1.5
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: -2
White
Screen photo
[open image]
Luminance 208 cd/m2
Luminance spread 10 cd/m2 (2 standard deviations)
Exposure value –0.21 stops   (aim for –2 to –3)
Exposure spread 0.07 stops
Area used for calculation 0.376 x 0.376
Camera settings Exposure time: 1/500   ISO: 400   F-number: 1.5
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: -2

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.