Contrast ratio results for iPad new backlit 0%

Contrast ratio 1362:1
Monitor model iPad new backlit 0%
Submitted 17 Dec 2012 23:11 CET, by 77.239.*.*
Camera model Canon EOS 5D Mark II
Processing remarks

Warning: image file 1: automatic white balance can cause inaccuracies.
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 37.1 s (Set EV to +1.6)
Warning: image file 2: automatic white balance can cause inaccuracies.
Warning: Image F-number settings are not the same.

Black
Screen photo
Luminance 0 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –4.09 stops   (aim for –2 to –3)
Exposure spread 0.72 stops
Area used for calculation 0.678 x 0.762
Camera settings Exposure time: 12.3   ISO: 200   F-number: 1.4
Focal length: 48.8 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 5 cd/m2
Luminance spread 2 cd/m2 (2 standard deviations)
Exposure value –3.09 stops   (aim for –2 to –3)
Exposure spread 0.4 stops
Area used for calculation 0.678 x 0.762
Camera settings Exposure time: 0.3   ISO: 200   F-number: 5.7
Focal length: 48.8 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.