Contrast ratio results

Contrast ratio 124:1
Monitor model
Submitted 27 Aug 2012 09:30 CEST, by 114.76.*.*
Camera model Canon EOS 5D Mark III
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: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.

Black
Screen photo
Luminance 1.28 cd/m2
Luminance spread 1.6 cd/m2 (2 standard deviations)
Exposure value –2.41 stops   (aim for –2 to –3)
Exposure spread 2.11 stops
Area used for calculation 0.309 x 0.412
Camera settings Exposure time: 1/4   ISO: 800   F-number: 4
Focal length: 23.3 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 159 cd/m2
Luminance spread 139 cd/m2 (2 standard deviations)
Exposure value –2.47 stops   (aim for –2 to –3)
Exposure spread 1.36 stops
Area used for calculation 0.309 x 0.412
Camera settings Exposure time: 1/512   ISO: 800   F-number: 4
Focal length: 23.3 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.