Contrast ratio results for Samsung 940t text mode

Contrast ratio 135:1
Monitor model Samsung 940t text mode
Submitted 06 May 2017 07:57 CEST, by 82.209.*.*
Camera model Nikon COOLPIX L21
Processing remarks

Warning: Image ISO settings are not the same.

Black
Screen photo
Luminance 0.28 cd/m2
Luminance spread 0.26 cd/m2 (2 standard deviations)
Exposure value –1.88 stops   (aim for –2 to –3)
Exposure spread 1.45 stops
Area used for calculation 0.592 x 0.592
Camera settings Exposure time: 1   ISO: 800   F-number: 3.1
Focal length: 41 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 38 cd/m2
Luminance spread 6 cd/m2 (2 standard deviations)
Exposure value –1.71 stops   (aim for –2 to –3)
Exposure spread 0.23 stops
Area used for calculation 0.592 x 0.592
Camera settings Exposure time: 1/30   ISO: 200   F-number: 3.1
Focal length: 41 mm   (35 mm equivalent)
Exposure compensation: 0
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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.