Contrast ratio results for LG 27GL850

Contrast ratio 426:1
Monitor model LG 27GL850
Submitted 06 Jun 2021 13:33 CEST, by 172.248.*.*
Camera model Sony ILCE-6000
Processing remarks

Note: image file 1: suggested exposure time: 0.4 s (Set EV to -1.3)
Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.

Black
Screen photo
Luminance 1.16 cd/m2
Luminance spread 0.3 cd/m2 (2 standard deviations)
Exposure value –1.17 stops   (aim for –2 to –3)
Exposure spread 0.38 stops
Area used for calculation 0.333 x 0.376
Camera settings Exposure time: 1   ISO: 400   F-number: 3.5
Focal length: 24 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 496 cd/m2
Luminance spread 55 cd/m2 (2 standard deviations)
Exposure value –2.08 stops   (aim for –2 to –3)
Exposure spread 0.16 stops
Area used for calculation 0.333 x 0.376
Camera settings Exposure time: 1/800   ISO: 400   F-number: 3.5
Focal length: 24 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.