Contrast ratio of IBM Thinkvision

Contrast ratio 356:1
Monitor model IBM Thinkvision
Submitted 08 Mar 2008 17:47 CET, by 91.153.*.*
Camera model Canon EOS 20D
Processing remarks


Black
Screen photo
Luminance 0.52 cd/m2
Luminance spread 0.18 cd/m2 (2 standard deviations)
Exposure value –2.99 stops   (aim for –2 to –3)
Exposure spread 0.52 stops
Area used for calculation 0.954 x 1
Camera settings Exposure time: 1.3   ISO: 400   F-number: 5
Focal length: 68.7 mm   (35 mm equivalent)
Exposure compensation: -1
White
Screen photo
Luminance 184 cd/m2
Luminance spread 38 cd/m2 (2 standard deviations)
Exposure value –2.21 stops   (aim for –2 to –3)
Exposure spread 0.3 stops
Area used for calculation 0.954 x 1
Camera settings Exposure time: 1/160   ISO: 400   F-number: 5
Focal length: 68.7 mm   (35 mm equivalent)
Exposure compensation: -1

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.