Contrast ratio results for EV2450

Contrast ratio 1:1
Monitor model EV2450
Submitted 10 Jan 2017 15:16 CET, by 195.160.*.*
Camera model Motorola XT1039
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.
image file 1: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
Warning: image file 1: Overexposed. Please decrease the shutter time.
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: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
Warning: image file 2: Overexposed. Please decrease the shutter 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: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
Warning: image file 3: Overexposed. Please decrease the shutter 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 32 cd/m2
Luminance spread 78 cd/m2 (2 standard deviations)
Exposure value –2.35 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.528 x 0.705
Camera settings Exposure time: 1/41   ISO: 125   F-number: 2.4
Focal length: 0 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 37 cd/m2
Luminance spread 98 cd/m2 (2 standard deviations)
Exposure value –2.34 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.528 x 0.705
Camera settings Exposure time: 1/48   ISO: 125   F-number: 2.4
Focal length: 0 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
Luminance 16 cd/m2
Luminance spread 38 cd/m2 (2 standard deviations)
Exposure value –2.56 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.528 x 0.705
Camera settings Exposure time: 1/30   ISO: 160   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.