Contrast ratio results

Contrast ratio 57:1
Monitor model
Submitted 21 Feb 2018 01:36 CET, by 161.0.*.*
Camera model samsung SM-J500M
Processing remarks


Black
Screen photo
Luminance 1.75 cd/m2
Luminance spread 4 cd/m2 (2 standard deviations)
Exposure value –2.9 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.371 x 0.495
Camera settings Exposure time: 1/17   ISO: 400   F-number: 1.9
Focal length: 28 mm   (35 mm equivalent)
Exposure compensation: 2
White
Screen photo
Luminance 100 cd/m2
Luminance spread 27 cd/m2 (2 standard deviations)
Exposure value –1.42 stops   (aim for –2 to –3)
Exposure spread 0.39 stops
Area used for calculation 0.371 x 0.495
Camera settings Exposure time: 1/347   ISO: 400   F-number: 1.9
Focal length: 28 mm   (35 mm equivalent)
Exposure compensation: 1

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.