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Contrast ratio results for HP w2408h

Contrast ratio 1108:1
Monitor model HP w2408h
Submitted 10 Feb 2008 21:20 CET, by 213.151.*.*
Camera model Pentax K100D
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 9.8 s (Set EV to +2.7)

Black
Screen photo
[open image]
Luminance 0.08 cd/m2
Luminance spread 0.03 cd/m2 (2 standard deviations)
Exposure value –5.21 stops   (aim for –2 to –3)
Exposure spread 0.62 stops
Area used for calculation 0.79 x 0.89
Camera settings Exposure time: 1.5   ISO: 400   F-number: 4.5
Focal length: 57 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 86 cd/m2
Luminance spread 24 cd/m2 (2 standard deviations)
Exposure value –1.59 stops   (aim for –2 to –3)
Exposure spread 0.4 stops
Area used for calculation 0.79 x 0.89
Camera settings Exposure time: 1/60   ISO: 400   F-number: 4.5
Focal length: 57 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.