Contrast ratio results

Contrast ratio 6402:1 (edge: 6402:1)
Monitor model
Submitted 24 Jan 2020 15:31 CET, by 96.49.*.*
Camera model Sony D5803
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 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 13.6 s (Set EV to +6.8)
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.
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.
Warning: image file 3: Underexposed. Please increase the shutter time.
Note: image file 3: suggested exposure time: 13.6 s (Set EV to +6.8)

Black
Screen photo
Luminance 0.01 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –9.27 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.528 x 0.704
Camera settings Exposure time: 1/8   ISO: 400   F-number: 2
Focal length: 0 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 71 cd/m2
Luminance spread 39 cd/m2 (2 standard deviations)
Exposure value –2.26 stops   (aim for –2 to –3)
Exposure spread 0.82 stops
Area used for calculation 0.528 x 0.704
Camera settings Exposure time: 1/399   ISO: 400   F-number: 2
Focal length: 0 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
Luminance 0.01 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –9.27 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.528 x 0.704
Camera settings Exposure time: 1/8   ISO: 400   F-number: 2
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.