Contrast ratio results

Contrast ratio 602:1
Monitor model
Submitted 16 Nov 2017 21:46 CET, by 151.74.*.*
Camera model Canon EOS 1200D
Processing remarks

Note: image file 2: suggested exposure time: 1/500 s (Set EV to -1.3)

Black
Screen photo
Luminance 0.38 cd/m2
Luminance spread 0.09 cd/m2 (2 standard deviations)
Exposure value –1.77 stops   (aim for –2 to –3)
Exposure spread 0.33 stops
Area used for calculation 0.393 x 0.442
Camera settings Exposure time: 2   ISO: 400   F-number: 3.5
Focal length: 28.3 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 231 cd/m2
Luminance spread 58 cd/m2 (2 standard deviations)
Exposure value –1.16 stops   (aim for –2 to –3)
Exposure spread 0.37 stops
Area used for calculation 0.393 x 0.442
Camera settings Exposure time: 1/197   ISO: 400   F-number: 3.5
Focal length: 28.3 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.