Contrast ratio results for medion

Contrast ratio 112:1
Monitor model medion
Submitted 31 Oct 2014 16:20 CET, by 37.115.*.*
Camera model LG Electronics LG-P715
Processing remarks

Warning: image file 1: could not determine angle of view; assuming 38 mm lens (35 mm equivalent).
Warning: image file 1: automatic white balance can cause inaccuracies.
Warning: image file 2: could not determine angle of view; assuming 38 mm lens (35 mm equivalent).
Warning: image file 2: automatic white balance can cause inaccuracies.
image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: image file 3: could not determine angle of view; assuming 38 mm lens (35 mm equivalent).
Warning: image file 3: automatic white balance can cause inaccuracies.
image file 3: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: Image ISO settings are not the same.
Warning: image file 3 is too bright to be a dark photo. Maybe you mixed up the files?

Black
Screen photo
Luminance 0.45 cd/m2
Luminance spread 0.43 cd/m2 (2 standard deviations)
Exposure value –2.72 stops   (aim for –2 to –3)
Exposure spread 1.52 stops
Area used for calculation 0.528 x 0.66
Camera settings Exposure time: 1/12   ISO: 2000   F-number: 2.4
Focal length: 0 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 50 cd/m2
Luminance spread 7 cd/m2 (2 standard deviations)
Exposure value –1.71 stops   (aim for –2 to –3)
Exposure spread 0.19 stops
Area used for calculation 0.528 x 0.66
Camera settings Exposure time: 1/100   ISO: 300   F-number: 2.4
Focal length: 0 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
Luminance 39 cd/m2
Luminance spread 49 cd/m2 (2 standard deviations)
Exposure value –1.66 stops   (aim for –2 to –3)
Exposure spread 2.16 stops
Area used for calculation 0.528 x 0.66
Camera settings Exposure time: 1/50   ISO: 200   F-number: 2.4
Focal length: 0 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.