Contrast ratio results

Contrast ratio 1640:1
Monitor model
Submitted 28 Aug 2021 00:45 CEST, by 37.6.*.*
Camera model samsung SM-A325F
Processing remarks

Warning: image file 2: Overexposed. Please decrease the shutter time.

Black
Screen photo
Luminance 0.15 cd/m2
Luminance spread 0.04 cd/m2 (2 standard deviations)
Exposure value –3.41 stops   (aim for –2 to –3)
Exposure spread 0.36 stops
Area used for calculation 0.361 x 0.361
Camera settings Exposure time: 0.5   ISO: 400   F-number: 1.9
Focal length: 25 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 239 cd/m2
Luminance spread 15 cd/m2 (2 standard deviations)
Exposure value –0.37 stops   (aim for –2 to –3)
Exposure spread 0.09 stops
Area used for calculation 0.361 x 0.361
Camera settings Exposure time: 1/400   ISO: 400   F-number: 1.9
Focal length: 25 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.