Contrast ratio results

Contrast ratio 115:1
Monitor model
Submitted 28 Dec 2013 18:53 CET, by 92.83.*.*
Camera model SAMSUNG GT-I8160
Processing remarks

Warning: image file 1: could not determine angle of view; assuming 38 mm lens (35 mm equivalent).
image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: image file 2: could not determine angle of view; assuming 38 mm lens (35 mm equivalent).
image file 2: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.

Black
Screen photo
Luminance 1.55 cd/m2
Luminance spread 2.81 cd/m2 (2 standard deviations)
Exposure value –3.01 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.528 x 0.528
Camera settings Exposure time: 1/8   ISO: 400   F-number: 2.7
Focal length: 0 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 178 cd/m2
Luminance spread 144 cd/m2 (2 standard deviations)
Exposure value –2.19 stops   (aim for –2 to –3)
Exposure spread 1.24 stops
Area used for calculation 0.528 x 0.528
Camera settings Exposure time: 1/520   ISO: 400   F-number: 2.7
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.