Contrast ratio results

Contrast ratio 1791:1 (edge: 1552:1)
Monitor model
Submitted 14 May 2019 10:18 CEST, by 86.253.*.*
Camera model samsung SM-G965F
Processing remarks

image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
image file 3: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.

Black
Screen photo
Luminance 0.14 cd/m2
Luminance spread 0.03 cd/m2 (2 standard deviations)
Exposure value –3.15 stops   (aim for –2 to –3)
Exposure spread 0.31 stops
Area used for calculation 0.376 x 0.376
Camera settings Exposure time: 1   ISO: 400   F-number: 2.4
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 248 cd/m2
Luminance spread 8 cd/m2 (2 standard deviations)
Exposure value –0.8 stops   (aim for –2 to –3)
Exposure spread 0.05 stops
Area used for calculation 0.376 x 0.376
Camera settings Exposure time: 1/350   ISO: 400   F-number: 2.4
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
Luminance 0.16 cd/m2
Luminance spread 0.03 cd/m2 (2 standard deviations)
Exposure value –2.95 stops   (aim for –2 to –3)
Exposure spread 0.23 stops
Area used for calculation 0.376 x 0.376
Camera settings Exposure time: 1   ISO: 400   F-number: 2.4
Focal length: 26 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.