Contrast ratio results

Contrast ratio 1392:1
Monitor model
Submitted 09 Dec 2019 11:40 CET, by 123.255.*.*
Camera model Canon EOS 400D DIGITAL
Processing remarks

Note: image file 1: suggested exposure time: 5.8 s (Set EV to +3.2)

Black
Screen photo
Luminance 0.08 cd/m2
Luminance spread 0.08 cd/m2 (2 standard deviations)
Exposure value –3.7 stops   (aim for –2 to –3)
Exposure spread 1.62 stops
Area used for calculation 0.39 x 0.44
Camera settings Exposure time: 2.5   ISO: 400   F-number: 3.5
Focal length: 28.1 mm   (35 mm equivalent)
Exposure compensation: 2
White
Screen photo
Luminance 112 cd/m2
Luminance spread 20 cd/m2 (2 standard deviations)
Exposure value –1.55 stops   (aim for –2 to –3)
Exposure spread 0.26 stops
Area used for calculation 0.39 x 0.44
Camera settings Exposure time: 1/125   ISO: 400   F-number: 3.5
Focal length: 28.1 mm   (35 mm equivalent)
Exposure compensation: 2

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.