Contrast ratio results

Contrast ratio 652:1
Monitor model
Submitted 30 May 2018 00:06 CEST, by 90.228.*.*
Camera model Canon EOS 1000D
Processing remarks

Note: image file 1: suggested exposure time: 4.6 s (Set EV to +1.2)

Black
Screen photo
Luminance 0.13 cd/m2
Luminance spread 0.06 cd/m2 (2 standard deviations)
Exposure value –3.7 stops   (aim for –2 to –3)
Exposure spread 0.68 stops
Area used for calculation 0.607 x 0.684
Camera settings Exposure time: 2   ISO: 400   F-number: 4
Focal length: 43.7 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 86 cd/m2
Luminance spread 36 cd/m2 (2 standard deviations)
Exposure value –2.97 stops   (aim for –2 to –3)
Exposure spread 0.61 stops
Area used for calculation 0.607 x 0.684
Camera settings Exposure time: 1/197   ISO: 400   F-number: 4
Focal length: 43.7 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.