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Contrast ratio of LG 27GP850

Contrast ratio 845:1 (edge: 939:1)
Monitor model LG 27GP850
Submitted 30 Jan 2022 00:56 CET, by 178.19.*.*
Camera model samsung SM-N975F
Processing remarks


Black
Screen photo
[open image]
Luminance 0.3 cd/m2
Luminance spread 0.05 cd/m2 (2 standard deviations)
Exposure value –2.04 stops   (aim for –2 to –3)
Exposure spread 0.23 stops
Area used for calculation 0.425 x 0.319
Camera settings Exposure time: 1   ISO: 400   F-number: 2.4
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 253 cd/m2
Luminance spread 7 cd/m2 (2 standard deviations)
Exposure value –0.77 stops   (aim for –2 to –3)
Exposure spread 0.04 stops
Area used for calculation 0.425 x 0.319
Camera settings Exposure time: 1/350   ISO: 400   F-number: 2.4
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.27 cd/m2
Luminance spread 0.04 cd/m2 (2 standard deviations)
Exposure value –2.19 stops   (aim for –2 to –3)
Exposure spread 0.21 stops
Area used for calculation 0.425 x 0.319
Camera settings Exposure time: 1   ISO: 400   F-number: 2.4
Focal length: 26 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.