Contrast ratio results for 27GL850

Contrast ratio 691:1
Monitor model 27GL850
Submitted 03 Dec 2019 21:28 CET, by 85.246.*.*
Camera model Nikon D3200
Processing remarks

Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.

Black
Screen photo
Luminance 0.61 cd/m2
Luminance spread 0.39 cd/m2 (2 standard deviations)
Exposure value –2.85 stops   (aim for –2 to –3)
Exposure spread 0.95 stops
Area used for calculation 0.375 x 0.423
Camera settings Exposure time: 0.6   ISO: 400   F-number: 3.5
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 418 cd/m2
Luminance spread 38 cd/m2 (2 standard deviations)
Exposure value –2.32 stops   (aim for –2 to –3)
Exposure spread 0.13 stops
Area used for calculation 0.375 x 0.423
Camera settings Exposure time: 1/800   ISO: 400   F-number: 3.5
Focal length: 27 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.