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Contrast ratio results for LG W1941S

Contrast ratio 969:1 (edge: 1031:1)
Monitor model LG W1941S
Submitted 16 Mar 2009 16:52 CET, by 93.152.*.*
Camera model Canon PowerShot A710 IS
Processing remarks

Warning: image file 1: automatic white balance can cause inaccuracies.
Note: image file 1: suggested exposure time: 1.3 s (Set EV to +1.2)
Warning: image file 2: automatic white balance can cause inaccuracies.
Warning: image file 3: automatic white balance can cause inaccuracies.
Note: image file 3: suggested exposure time: 1.4 s (Set EV to +1.3)

Black
Screen photo
[open image]
Luminance 0.22 cd/m2
Luminance spread 0.1 cd/m2 (2 standard deviations)
Exposure value –3.66 stops   (aim for –2 to –3)
Exposure spread 0.67 stops
Area used for calculation 0.495 x 0.495
Camera settings Exposure time: 0.6   ISO: 408   F-number: 2.8
Focal length: 34.3 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 210 cd/m2
Luminance spread 26 cd/m2 (2 standard deviations)
Exposure value –1.97 stops   (aim for –2 to –3)
Exposure spread 0.18 stops
Area used for calculation 0.495 x 0.495
Camera settings Exposure time: 1/501   ISO: 408   F-number: 2.8
Focal length: 34.3 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.2 cd/m2
Luminance spread 0.09 cd/m2 (2 standard deviations)
Exposure value –3.75 stops   (aim for –2 to –3)
Exposure spread 0.66 stops
Area used for calculation 0.495 x 0.495
Camera settings Exposure time: 0.6   ISO: 408   F-number: 2.8
Focal length: 34.3 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.