Contrast ratio of Dell S2440l

Contrast ratio 6107:1
Monitor model Dell S2440l
Submitted 21 Dec 2017 01:49 CET, by 97.87.*.*
Camera model samsung SM-G920V
Processing remarks


Black
Screen photo
Luminance 0.04 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –3.39 stops   (aim for –2 to –3)
Exposure spread 0.31 stops
Area used for calculation 0.66 x 0.278
Camera settings Exposure time: 4   ISO: 200   F-number: 1.9
Focal length: 28 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 224 cd/m2
Luminance spread 10 cd/m2 (2 standard deviations)
Exposure value –1.78 stops   (aim for –2 to –3)
Exposure spread 0.07 stops
Area used for calculation 0.66 x 0.278
Camera settings Exposure time: 1/498   ISO: 200   F-number: 1.9
Focal length: 28 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.