Contrast ratio results

Contrast ratio 159:1
Monitor model
Submitted 14 Dec 2017 03:30 CET, by 163.11.*.*
Camera model samsung SAMSUNG-SM-G920A
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 0.5 s (Set EV to +5.9)
Note: image file 2: suggested exposure time: 1/320 s (Set EV to -1.4)

Black
Screen photo
Luminance 0.28 cd/m2
Luminance spread 0.19 cd/m2 (2 standard deviations)
Exposure value –8.43 stops   (aim for –2 to –3)
Exposure spread 1.04 stops
Area used for calculation 0.378 x 0.468
Camera settings Exposure time: 1/124   ISO: 400   F-number: 1.9
Focal length: 28 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 44 cd/m2
Luminance spread 3 cd/m2 (2 standard deviations)
Exposure value –1.11 stops   (aim for –2 to –3)
Exposure spread 0.1 stops
Area used for calculation 0.403 x 0.407
Camera settings Exposure time: 1/124   ISO: 400   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.