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Contrast ratio results for EliteBook 8460p

Contrast ratio 246:1
Monitor model EliteBook 8460p
Submitted 24 Sep 2012 19:38 CEST, by 86.56.*.*
Camera model Sony DSLR-A300
Processing remarks

Warning: image file 1: automatic white balance can cause inaccuracies.
Note: image file 1: suggested exposure time: 0.4 s (Set EV to +1.1)
Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.
Warning: image file 2: automatic white balance can cause inaccuracies.

Black
Screen photo
[open image]
Luminance 0.84 cd/m2
Luminance spread 1.94 cd/m2 (2 standard deviations)
Exposure value –3.58 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1/6   ISO: 400   F-number: 2.8
Focal length: 75 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 207 cd/m2
Luminance spread 97 cd/m2 (2 standard deviations)
Exposure value –3.02 stops   (aim for –2 to –3)
Exposure spread 0.69 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1/1000   ISO: 400   F-number: 2.8
Focal length: 75 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.