Contrast ratio results

Contrast ratio 306:1
Monitor model
Submitted 13 Sep 2019 09:28 CEST, by 65.131.*.*
Camera model Nikon D5200
Processing remarks

Note: image file 1: suggested exposure time: 5.6 s (Set EV to +3.6)
Warning: image file 2: Overexposed. Please decrease the shutter time.
Note: image file 2: suggested exposure time: 1/55 s (Set EV to -9.4)

Black
Screen photo
Luminance 0.08 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –1.08 stops   (aim for –2 to –3)
Exposure spread 0.05 stops
Area used for calculation 0.375 x 0.421
Camera settings Exposure time: 15   ISO: 400   F-number: 3.5
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: 5
White
Screen photo
Luminance 25 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –0.05 stops   (aim for –2 to –3)
Exposure spread 0.02 stops
Area used for calculation 0.375 x 0.421
Camera settings Exposure time: 1/10   ISO: 400   F-number: 3.5
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: -7

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.