Contrast ratio results

Contrast ratio 2675:1
Monitor model
Submitted 12 Apr 2020 11:03 CEST, by 177.76.*.*
Camera model Canon EOS 70D
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 7.6 s (Set EV to +4.9)

Black
Screen photo
Luminance 0.04 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –7.42 stops   (aim for –2 to –3)
Exposure spread 0.58 stops
Area used for calculation 0.876 x 0.986
Camera settings Exposure time: 1/4   ISO: 400   F-number: 2.8
Focal length: 63.1 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 105 cd/m2
Luminance spread 87 cd/m2 (2 standard deviations)
Exposure value –2.66 stops   (aim for –2 to –3)
Exposure spread 1.27 stops
Area used for calculation 0.876 x 0.986
Camera settings Exposure time: 1/395   ISO: 400   F-number: 2.8
Focal length: 63.1 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.