Contrast ratio results

Contrast ratio 1833:1
Monitor model
Submitted 07 Feb 2011 02:30 CET, by 71.114.*.*
Camera model Motorola Droid
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 20.5 s (Set EV to +6.3)
Note: image file 2: suggested exposure time: 1/49 s (Set EV to -0.7)
Warning: Image ISO settings are not the same.

Black
Screen photo
Luminance 0.03 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –10.76 stops   (aim for –2 to –3)
Exposure spread 1.13 stops
Area used for calculation 0.433 x 0.433
Camera settings Exposure time: 1/15   ISO: 199   F-number: 2.8
Focal length: 30 mm   (35 mm equivalent)
Exposure compensation: -1.99
White
Screen photo
Luminance 53 cd/m2
Luminance spread 7 cd/m2 (2 standard deviations)
Exposure value –3.81 stops   (aim for –2 to –3)
Exposure spread 0.18 stops
Area used for calculation 0.433 x 0.433
Camera settings Exposure time: 1/120   ISO: 108   F-number: 2.8
Focal length: 30 mm   (35 mm equivalent)
Exposure compensation: -1.99

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.