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Contrast ratio results for HP ZR2440w

Contrast ratio 1331:1
Monitor model HP ZR2440w
Submitted 16 Jun 2012 17:29 CEST, by 77.195.*.*
Camera model Minolta DiMAGE A2
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 3.6 s (Set EV to +1.9)

Black
Screen photo
[open image]
Luminance 0.08 cd/m2
Luminance spread 0.05 cd/m2 (2 standard deviations)
Exposure value –4.36 stops   (aim for –2 to –3)
Exposure spread 0.84 stops
Area used for calculation 0.404 x 0.404
Camera settings Exposure time: 1   ISO: 400   F-number: 2.8
Focal length: 28 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 109 cd/m2
Luminance spread 9 cd/m2 (2 standard deviations)
Exposure value –2.63 stops   (aim for –2 to –3)
Exposure spread 0.13 stops
Area used for calculation 0.404 x 0.404
Camera settings Exposure time: 1/400   ISO: 400   F-number: 2.8
Focal length: 28 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.