Contrast ratio results

Contrast ratio 1604:1
Monitor model
Submitted 22 Nov 2013 08:41 CET, by 122.170.*.*
Camera model Canon EOS 1100D
Processing remarks

Note: image file 1: suggested exposure time: 3.0 s (Set EV to -1.0)
Warning: Image focal lengths/zoom levels are not the same.

Black
Screen photo
Luminance 0.2 cd/m2
Luminance spread 0.15 cd/m2 (2 standard deviations)
Exposure value –1.47 stops   (aim for –2 to –3)
Exposure spread 1.14 stops
Area used for calculation 0.393 x 0.442
Camera settings Exposure time: 6.2   ISO: 400   F-number: 4
Focal length: 28.3 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 319 cd/m2
Luminance spread 35 cd/m2 (2 standard deviations)
Exposure value –2.08 stops   (aim for –2 to –3)
Exposure spread 0.16 stops
Area used for calculation 0.503 x 0.566
Camera settings Exposure time: 1/395   ISO: 400   F-number: 4
Focal length: 36.2 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.