Contrast ratio results

Contrast ratio 52:1
Monitor model
Submitted 28 Jun 2015 21:12 CEST, by 151.49.*.*
Camera model Sony SLT-A58
Processing remarks

image file 1: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
Note: image file 1: suggested exposure time: 0.6 s (Set EV to +1.2)
Note: image file 2: suggested exposure time: 1/88 s (Set EV to +1.2)

Black
Screen photo
Luminance 0.78 cd/m2
Luminance spread 4.45 cd/m2 (2 standard deviations)
Exposure value –3.75 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.375 x 0.422
Camera settings Exposure time: 1/4   ISO: 400   F-number: 3.5
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 41 cd/m2
Luminance spread 25 cd/m2 (2 standard deviations)
Exposure value –3.68 stops   (aim for –2 to –3)
Exposure spread 0.92 stops
Area used for calculation 0.375 x 0.422
Camera settings Exposure time: 1/200   ISO: 400   F-number: 3.5
Focal length: 27 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.