Contrast ratio results

Contrast ratio 561:1
Monitor model
Submitted 20 Feb 2015 19:06 CET, by 2.247.*.*
Camera model Sony NEX-5N
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 1/62 s (Set EV to +1.7)
Note: image file 2: suggested exposure time: 2.9 s (Set EV to -1.1)
Warning: image file 3: Underexposed. Please increase the shutter time.
Note: image file 3: suggested exposure time: 1/62 s (Set EV to +1.7)
Warning: Image F-number settings 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 0.27 cd/m2
Luminance spread 0.11 cd/m2 (2 standard deviations)
Exposure value –1.44 stops   (aim for –2 to –3)
Exposure spread 0.61 stops
Area used for calculation 0.65 x 0.867
Camera settings Exposure time: 6   ISO: 400   F-number: 4.5
Focal length: 49 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 149 cd/m2
Luminance spread 139 cd/m2 (2 standard deviations)
Exposure value –4.2 stops   (aim for –2 to –3)
Exposure spread 1.46 stops
Area used for calculation 0.65 x 0.867
Camera settings Exposure time: 1/200   ISO: 400   F-number: 8
Focal length: 49 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
Luminance 149 cd/m2
Luminance spread 139 cd/m2 (2 standard deviations)
Exposure value –4.2 stops   (aim for –2 to –3)
Exposure spread 1.46 stops
Area used for calculation 0.65 x 0.867
Camera settings Exposure time: 1/200   ISO: 400   F-number: 8
Focal length: 49 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.