Contrast ratio results

Contrast ratio 9106:1
Monitor model
Submitted 07 Feb 2011 02:25 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: 25.2 s (Set EV to +8.6)
Note: image file 2: suggested exposure time: 1/120 s (Set EV to -1.6)
Warning: Image ISO settings are not the same.

Black
Screen photo
Luminance 0.02 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –11.06 stops   (aim for –2 to –3)
Exposure spread 1.19 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: 0
White
Screen photo
Luminance 215 cd/m2
Luminance spread 24 cd/m2 (2 standard deviations)
Exposure value –0.87 stops   (aim for –2 to –3)
Exposure spread 0.16 stops
Area used for calculation 0.433 x 0.433
Camera settings Exposure time: 1/40   ISO: 68   F-number: 2.8
Focal length: 30 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.