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Contrast ratio of HP 1955

Contrast ratio 376:1 (edge: 473:1)
Monitor model HP 1955
Submitted 12 Aug 2011 08:02 CEST, by 188.168.*.*
Camera model Nikon D90
Processing remarks


Black
Screen photo
[open image]
Luminance 0.38 cd/m2
Luminance spread 0.1 cd/m2 (2 standard deviations)
Exposure value –2.42 stops   (aim for –2 to –3)
Exposure spread 0.4 stops
Area used for calculation 0.375 x 0.423
Camera settings Exposure time: 1.3   ISO: 400   F-number: 3.5
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 142 cd/m2
Luminance spread 9 cd/m2 (2 standard deviations)
Exposure value –1.56 stops   (aim for –2 to –3)
Exposure spread 0.09 stops
Area used for calculation 0.375 x 0.423
Camera settings Exposure time: 1/160   ISO: 400   F-number: 3.5
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.3 cd/m2
Luminance spread 0.09 cd/m2 (2 standard deviations)
Exposure value –2.45 stops   (aim for –2 to –3)
Exposure spread 0.43 stops
Area used for calculation 0.375 x 0.423
Camera settings Exposure time: 1.6   ISO: 400   F-number: 3.5
Focal length: 27 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.