Contrast ratio results

Contrast ratio 522:1
Monitor model
Submitted 15 Mar 2008 07:44 CET, by 24.68.*.*
Camera model Fujifilm FinePix F30
Processing remarks

Warning: image file 1: automatic white balance can cause inaccuracies.

Black
Screen photo
Luminance 0.31 cd/m2
Luminance spread 0.05 cd/m2 (2 standard deviations)
Exposure value –2.46 stops   (aim for –2 to –3)
Exposure spread 0.23 stops
Area used for calculation 0.52 x 0.52
Camera settings Exposure time: 1   ISO: 400   F-number: 2.8
Focal length: 36 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 159 cd/m2
Luminance spread 12 cd/m2 (2 standard deviations)
Exposure value –1.31 stops   (aim for –2 to –3)
Exposure spread 0.11 stops
Area used for calculation 0.52 x 0.52
Camera settings Exposure time: 1/236   ISO: 400   F-number: 2.8
Focal length: 36 mm   (35 mm equivalent)
Exposure compensation: -0.33

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.