Contrast ratio results

Contrast ratio 3125:1
Monitor model
Submitted 18 Aug 2012 01:15 CEST, by 109.99.*.*
Camera model SAMSUNG GT-I9300
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: 4.5 s (Set EV to +8.2)
Warning: image file 2: could not determine angle of view; assuming 38 mm lens (35 mm equivalent).
Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.
Warning: image file 3: could not determine angle of view; assuming 38 mm lens (35 mm equivalent).
Warning: image file 3: automatic white balance can cause inaccuracies.
image file 3: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
Warning: image file 3 is too bright to be a dark photo. Maybe you mixed up the files?

Black
Screen photo
Luminance 0.06 cd/m2
Luminance spread 0.13 cd/m2 (2 standard deviations)
Exposure value –8.74 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.528 x 0.528
Camera settings Exposure time: 1/17   ISO: 400   F-number: 2.6
Focal length: 0 mm   (35 mm equivalent)
Exposure compensation: 2
White
Screen photo
Luminance 179 cd/m2
Luminance spread 57 cd/m2 (2 standard deviations)
Exposure value –3.06 stops   (aim for –2 to –3)
Exposure spread 0.46 stops
Area used for calculation 0.528 x 0.528
Camera settings Exposure time: 1/1032   ISO: 400   F-number: 2.6
Focal length: 0 mm   (35 mm equivalent)
Exposure compensation: -2
Black at screen edge
Screen photo
Luminance 70 cd/m2
Luminance spread 166 cd/m2 (2 standard deviations)
Exposure value –1.71 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.528 x 0.528
Camera settings Exposure time: 1/158   ISO: 400   F-number: 2.6
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.