Contrast ratio results

Contrast ratio 658195:1
Monitor model
Submitted 29 Apr 2015 07:39 CEST, by 177.132.*.*
Camera model Sony NEX-F3
Processing remarks

image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 1103.1 s (Set EV to +2.6)
image file 2: 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.

Black
Screen photo
Luminance 0 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –5.1 stops   (aim for –2 to –3)
Exposure spread 1.11 stops
Area used for calculation 0.416 x 0.47
Camera settings Exposure time: 182   ISO: 800   F-number: 3.5
Focal length: 30 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 138 cd/m2
Luminance spread 41 cd/m2 (2 standard deviations)
Exposure value –2.98 stops   (aim for –2 to –3)
Exposure spread 0.43 stops
Area used for calculation 0.416 x 0.47
Camera settings Exposure time: 1/13   ISO: 200   F-number: 14
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.