Contrast ratio results for Apple iPhone 3G 8GB

Contrast ratio 168:1
Monitor model Apple iPhone 3G 8GB
Submitted 11 Feb 2009 04:43 CET, by 24.207.*.*
Camera model SAMSUNG TECHWIN CO. LTD. Samsung S85
Processing remarks

Warning: image file 1: automatic white balance can cause inaccuracies.
Warning: image file 2: automatic white balance can cause inaccuracies.

Black
Screen photo
Luminance 0.19 cd/m2
Luminance spread 0.1 cd/m2 (2 standard deviations)
Exposure value –3.28 stops   (aim for –2 to –3)
Exposure spread 0.78 stops
Area used for calculation 0.549 x 0.549
Camera settings Exposure time: 2   ISO: 200   F-number: 2.9
Focal length: 38 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 31 cd/m2
Luminance spread 5 cd/m2 (2 standard deviations)
Exposure value –2.79 stops   (aim for –2 to –3)
Exposure spread 0.24 stops
Area used for calculation 0.549 x 0.549
Camera settings Exposure time: 1/60   ISO: 200   F-number: 2.9
Focal length: 38 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.