Contrast ratio results

Contrast ratio 2534:1
Monitor model
Submitted 08 Apr 2017 13:58 CEST, by 50.24.*.*
Camera model samsung SAMSUNG-SM-G890A
Processing remarks

image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.

Black
Screen photo
Luminance 0.1 cd/m2
Luminance spread 0.06 cd/m2 (2 standard deviations)
Exposure value –2.97 stops   (aim for –2 to –3)
Exposure spread 0.83 stops
Area used for calculation 0.404 x 0.404
Camera settings Exposure time: 2   ISO: 200   F-number: 1.9
Focal length: 28 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 250 cd/m2
Luminance spread 43 cd/m2 (2 standard deviations)
Exposure value –1.11 stops   (aim for –2 to –3)
Exposure spread 0.25 stops
Area used for calculation 0.404 x 0.404
Camera settings Exposure time: 1/350   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.