Contrast ratio results

Contrast ratio 11:1
Monitor model
Submitted 28 Jan 2014 10:32 CET, by 89.252.*.*
Camera model Nikon D300
Processing remarks

Warning: image file 1: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.
Warning: image file 1: automatic white balance can cause inaccuracies.
image file 1: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
image file 2: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
Warning: image file 2: Overexposed. Please decrease the shutter time.
Warning: image file 3: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.
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 ISO settings are not the same.
Warning: Image F-number settings are not the same.
Warning: Images were taken with different cameras.
Warning: Image focal lengths/zoom levels are not the same.
Warning: image file 3 is too bright to be a dark photo. Maybe you mixed up the files?

Black
Screen photo
Luminance 501 cd/m2
Luminance spread 1148 cd/m2 (2 standard deviations)
Exposure value –1.87 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.406 x 0.481
Camera settings Exposure time: 1/166   ISO: 640   F-number: 9.1
Focal length: 29.7 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 5432 cd/m2
Luminance spread 6147 cd/m2 (2 standard deviations)
Exposure value –1.71 stops   (aim for –2 to –3)
Exposure spread 1.85 stops
Area used for calculation 0.376 x 0.475
Camera settings Exposure time: 1/640   ISO: 250   F-number: 9
Focal length: 28 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
Luminance 5432 cd/m2
Luminance spread 6147 cd/m2 (2 standard deviations)
Exposure value –1.71 stops   (aim for –2 to –3)
Exposure spread 1.85 stops
Area used for calculation 0.376 x 0.475
Camera settings Exposure time: 1/640   ISO: 250   F-number: 9
Focal length: 28 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.