Contrast ratio results

Contrast ratio 979:1
Monitor model
Submitted 12 May 2018 09:57 CEST, by 67.61.*.*
Camera model samsung SM-G930V
Processing remarks

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

Black
Screen photo
Luminance 0.34 cd/m2
Luminance spread 0.07 cd/m2 (2 standard deviations)
Exposure value –2.87 stops   (aim for –2 to –3)
Exposure spread 0.3 stops
Area used for calculation 0.425 x 0.319
Camera settings Exposure time: 1/4   ISO: 400   F-number: 1.7
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 331 cd/m2
Luminance spread 48 cd/m2 (2 standard deviations)
Exposure value –0.9 stops   (aim for –2 to –3)
Exposure spread 0.21 stops
Area used for calculation 0.425 x 0.319
Camera settings Exposure time: 1/999   ISO: 400   F-number: 1.7
Focal length: 26 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.