Contrast ratio results

Contrast ratio 789:1
Monitor model
Submitted 09 Apr 2017 04:44 CEST, by 50.24.*.*
Camera model samsung SAMSUNG-SM-G890A
Processing remarks

Note: image file 2: suggested exposure time: 1/220 s (Set EV to +1.2)

Black
Screen photo
Luminance 0.08 cd/m2
Luminance spread 0.03 cd/m2 (2 standard deviations)
Exposure value –2.33 stops   (aim for –2 to –3)
Exposure spread 0.49 stops
Area used for calculation 0.404 x 0.404
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 61 cd/m2
Luminance spread 4 cd/m2 (2 standard deviations)
Exposure value –3.66 stops   (aim for –2 to –3)
Exposure spread 0.11 stops
Area used for calculation 0.404 x 0.404
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.