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Contrast ratio results for LG 29UM68

Contrast ratio 173:1 (edge: 145:1)
Monitor model LG 29UM68
Submitted 21 Oct 2019 17:04 CEST, by 197.185.*.*
Camera model Panasonic DC-GH5
Processing remarks

Note: image file 1: suggested exposure time: 0.4 s (Set EV to -1.3)
Note: image file 3: suggested exposure time: 0.4 s (Set EV to -1.2)
Warning: Image F-number settings are not the same.
Warning: Image focal lengths/zoom levels are not the same.

Black
Screen photo
[open image]
Luminance 0.73 cd/m2
Luminance spread 0.04 cd/m2 (2 standard deviations)
Exposure value –1.21 stops   (aim for –2 to –3)
Exposure spread 0.08 stops
Area used for calculation 0.345 x 0.46
Camera settings Exposure time: 1   ISO: 400   F-number: 2.8
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 126 cd/m2
Luminance spread 16 cd/m2 (2 standard deviations)
Exposure value –2.42 stops   (aim for –2 to –3)
Exposure spread 0.18 stops
Area used for calculation 0.345 x 0.46
Camera settings Exposure time: 1/400   ISO: 400   F-number: 2.8
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.86 cd/m2
Luminance spread 0.09 cd/m2 (2 standard deviations)
Exposure value –1.34 stops   (aim for –2 to –3)
Exposure spread 0.16 stops
Area used for calculation 0.398 x 0.53
Camera settings Exposure time: 1   ISO: 400   F-number: 3.2
Focal length: 30 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.