Contrast ratio results

Contrast ratio 667:1
Monitor model
Submitted 06 Aug 2014 14:00 CEST, by 46.59.*.*
Camera model Nikon D5100
Processing remarks

image file 1: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
image file 2: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.

Black
Screen photo
Luminance 0.53 cd/m2
Luminance spread 0.3 cd/m2 (2 standard deviations)
Exposure value –2.54 stops   (aim for –2 to –3)
Exposure spread 0.85 stops
Area used for calculation 0.43 x 0.487
Camera settings Exposure time: 1   ISO: 400   F-number: 3.8
Focal length: 31 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 354 cd/m2
Luminance spread 196 cd/m2 (2 standard deviations)
Exposure value –1.48 stops   (aim for –2 to –3)
Exposure spread 0.82 stops
Area used for calculation 0.43 x 0.487
Camera settings Exposure time: 1/320   ISO: 400   F-number: 3.8
Focal length: 31 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.