Contrast ratio results

Contrast ratio 1236:1
Monitor model
Submitted 07 Apr 2020 09:02 CEST, by 125.237.*.*
Camera model Canon EOS 100D
Processing remarks

Note: image file 2: suggested exposure time: 1/470 s (Set EV to -1.3)
Warning: Image focal lengths/zoom levels are not the same.

Black
Screen photo
Luminance 0.18 cd/m2
Luminance spread 0.04 cd/m2 (2 standard deviations)
Exposure value –2.89 stops   (aim for –2 to –3)
Exposure spread 0.37 stops
Area used for calculation 0.396 x 0.445
Camera settings Exposure time: 2   ISO: 400   F-number: 3.5
Focal length: 28.5 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 218 cd/m2
Luminance spread 29 cd/m2 (2 standard deviations)
Exposure value –1.24 stops   (aim for –2 to –3)
Exposure spread 0.19 stops
Area used for calculation 0.44 x 0.495
Camera settings Exposure time: 1/197   ISO: 400   F-number: 3.5
Focal length: 31.7 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.