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Contrast ratio results for HP/LP2475W

Contrast ratio 714:1
Monitor model HP/LP2475W
Submitted 15 Nov 2008 03:29 CET, by 81.175.*.*
Camera model Canon EOS 10D
Processing remarks

Warning: image file 1: automatic white balance can cause inaccuracies.
Warning: image file 2: automatic white balance can cause inaccuracies.

Black
Screen photo
[open image]
Luminance 0.19 cd/m2
Luminance spread 0.13 cd/m2 (2 standard deviations)
Exposure value –3.13 stops   (aim for –2 to –3)
Exposure spread 1.05 stops
Area used for calculation 0.603 x 0.678
Camera settings Exposure time: 1   ISO: 400   F-number: 2.8
Focal length: 43.4 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 137 cd/m2
Luminance spread 20 cd/m2 (2 standard deviations)
Exposure value –2.3 stops   (aim for –2 to –3)
Exposure spread 0.22 stops
Area used for calculation 0.603 x 0.678
Camera settings Exposure time: 1/400   ISO: 400   F-number: 2.8
Focal length: 43.4 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.