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Contrast ratio of HP w2007

Contrast ratio 407:1
Monitor model HP w2007
Submitted 26 Aug 2008 14:26 CEST, by 70.95.*.*
Camera model Canon PowerShot SD550
Processing remarks


Black
Screen photo
[open image]
Luminance 0.55 cd/m2
Luminance spread 0.68 cd/m2 (2 standard deviations)
Exposure value –2.93 stops   (aim for –2 to –3)
Exposure spread 2.1 stops
Area used for calculation 0.521 x 0.521
Camera settings Exposure time: 0.8   ISO: 200   F-number: 2.8
Focal length: 36.1 mm   (35 mm equivalent)
Exposure compensation: 2
White
Screen photo
[open image]
Luminance 224 cd/m2
Luminance spread 49 cd/m2 (2 standard deviations)
Exposure value –2.59 stops   (aim for –2 to –3)
Exposure spread 0.32 stops
Area used for calculation 0.521 x 0.521
Camera settings Exposure time: 1/403   ISO: 200   F-number: 2.8
Focal length: 36.1 mm   (35 mm equivalent)
Exposure compensation: -2

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.