Contrast ratio results

Contrast ratio 553:1
Monitor model
Submitted 21 Jun 2014 05:52 CEST, by 184.18.*.*
Camera model Canon EOS 50D
Processing remarks


Black
Screen photo
Luminance 0.19 cd/m2
Luminance spread 0.08 cd/m2 (2 standard deviations)
Exposure value –2.81 stops   (aim for –2 to –3)
Exposure spread 0.6 stops
Area used for calculation 0.528 x 0.594
Camera settings Exposure time: 2.6   ISO: 400   F-number: 4
Focal length: 38 mm   (35 mm equivalent)
Exposure compensation: 1
White
Screen photo
Luminance 104 cd/m2
Luminance spread 21 cd/m2 (2 standard deviations)
Exposure value –2.08 stops   (aim for –2 to –3)
Exposure spread 0.29 stops
Area used for calculation 0.528 x 0.594
Camera settings Exposure time: 1/128   ISO: 400   F-number: 4
Focal length: 38 mm   (35 mm equivalent)
Exposure compensation: 1

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.