Contrast ratio results

Contrast ratio 682:1 (edge: 691:1)
Monitor model
Submitted 16 Nov 2017 21:34 CET, by 151.74.*.*
Camera model Canon EOS 1200D
Processing remarks

image file 3: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.

Black
Screen photo
Luminance 0.35 cd/m2
Luminance spread 0.12 cd/m2 (2 standard deviations)
Exposure value –2.9 stops   (aim for –2 to –3)
Exposure spread 0.52 stops
Area used for calculation 0.393 x 0.442
Camera settings Exposure time: 1   ISO: 400   F-number: 3.5
Focal length: 28.3 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 239 cd/m2
Luminance spread 70 cd/m2 (2 standard deviations)
Exposure value –2.11 stops   (aim for –2 to –3)
Exposure spread 0.43 stops
Area used for calculation 0.393 x 0.442
Camera settings Exposure time: 1/395   ISO: 400   F-number: 3.5
Focal length: 28.3 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
Luminance 0.35 cd/m2
Luminance spread 0.09 cd/m2 (2 standard deviations)
Exposure value –2.92 stops   (aim for –2 to –3)
Exposure spread 0.39 stops
Area used for calculation 0.393 x 0.442
Camera settings Exposure time: 1   ISO: 400   F-number: 3.5
Focal length: 28.3 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.