Contrast ratio results

Contrast ratio 503:1
Monitor model
Submitted 16 Aug 2021 23:01 CEST, by 89.65.*.*
Camera model Panasonic DMC-FZ18
Processing remarks

Warning: Image ISO settings are not the same.

Black
Screen photo
Luminance 0.25 cd/m2
Luminance spread 0.06 cd/m2 (2 standard deviations)
Exposure value –1.73 stops   (aim for –2 to –3)
Exposure spread 0.36 stops
Area used for calculation 0.404 x 0.404
Camera settings Exposure time: 4   ISO: 200   F-number: 2.8
Focal length: 28 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 128 cd/m2
Luminance spread 12 cd/m2 (2 standard deviations)
Exposure value –2.39 stops   (aim for –2 to –3)
Exposure spread 0.14 stops
Area used for calculation 0.378 x 0.47
Camera settings Exposure time: 1/400   ISO: 400   F-number: 2.8
Focal length: 28 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.