Contrast ratio results

Contrast ratio 9027:1
Monitor model
Submitted 24 Feb 2014 17:09 CET, by 78.60.*.*
Camera model Canon EOS 450D
Processing remarks

Warning: image file 1: camera was zoomed in too much.
Warning: image file 1: automatic white balance can cause inaccuracies.
Warning: image file 2: camera was zoomed in too much.
Warning: image file 2: automatic white balance can cause inaccuracies.

Black
Screen photo
Luminance 0.01 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –2.44 stops   (aim for –2 to –3)
Exposure spread 0.57 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 16   ISO: 400   F-number: 1.8
Focal length: 80.8 mm   (35 mm equivalent)
Exposure compensation: 1
White
Screen photo
Luminance 72 cd/m2
Luminance spread 39 cd/m2 (2 standard deviations)
Exposure value –2.3 stops   (aim for –2 to –3)
Exposure spread 0.8 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1/512   ISO: 400   F-number: 1.8
Focal length: 80.8 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.