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Contrast ratio results for HP w2207h

Contrast ratio 11:1
Monitor model HP w2207h
Submitted 27 Nov 2010 07:39 CET, by 68.25.*.*
Camera model Sony DSC-R1
Processing remarks

Note: image file 1: suggested exposure time: 2.1 s (Set EV to +1.1)
Warning: image file 2: Overexposed. Please decrease the shutter time.
Note: image file 2: suggested exposure time: 1/5 s (Set EV to -2.4)

Black
Screen photo
[open image]
Luminance 0.14 cd/m2
Luminance spread 0.03 cd/m2 (2 standard deviations)
Exposure value –3.57 stops   (aim for –2 to –3)
Exposure spread 0.27 stops
Area used for calculation 0.332 x 0.373
Camera settings Exposure time: 1   ISO: 400   F-number: 2.8
Focal length: 23.9 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 1.57 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –0.09 stops   (aim for –2 to –3)
Exposure spread 0 stops
Area used for calculation 0.332 x 0.373
Camera settings Exposure time: 1   ISO: 400   F-number: 2.8
Focal length: 23.9 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.