Contrast ratio results

Contrast ratio 46681:1
Monitor model
Submitted 20 Sep 2008 17:31 CEST, by 125.238.*.*
Camera model Sony DSC-T100
Processing remarks

Warning: image file 1: could not determine angle of view; assuming 38 mm lens (35 mm equivalent).
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 14.2 s (Set EV to +5.5)
Warning: image file 2: could not determine angle of view; assuming 38 mm lens (35 mm equivalent).
Warning: Image ISO settings are not the same.

Black
Screen photo
Luminance 0 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –10.03 stops   (aim for –2 to –3)
Exposure spread 2.46 stops
Area used for calculation 0.528 x 0.528
Camera settings Exposure time: 1/13   ISO: 3   F-number: 3.5
Focal length: 0 mm   (35 mm equivalent)
Exposure compensation: -2
White
Screen photo
Luminance 190 cd/m2
Luminance spread 21 cd/m2 (2 standard deviations)
Exposure value –1.79 stops   (aim for –2 to –3)
Exposure spread 0.16 stops
Area used for calculation 0.528 x 0.528
Camera settings Exposure time: 1/50   ISO: 80   F-number: 3.5
Focal length: 0 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.