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Contrast ratio of LG W1941S

Contrast ratio 860:1 (edge: 1033:1)
Monitor model LG W1941S
Submitted 16 Mar 2009 17:10 CET, by 93.152.*.*
Camera model Canon PowerShot A710 IS
Processing remarks


Black
Screen photo
[open image]
Luminance 0.25 cd/m2
Luminance spread 0.07 cd/m2 (2 standard deviations)
Exposure value –3.01 stops   (aim for –2 to –3)
Exposure spread 0.42 stops
Area used for calculation 0.495 x 0.495
Camera settings Exposure time: 0.8   ISO: 408   F-number: 2.8
Focal length: 34.3 mm   (35 mm equivalent)
Exposure compensation: 1
White
Screen photo
[open image]
Luminance 219 cd/m2
Luminance spread 31 cd/m2 (2 standard deviations)
Exposure value –1.6 stops   (aim for –2 to –3)
Exposure spread 0.2 stops
Area used for calculation 0.495 x 0.495
Camera settings Exposure time: 1/403   ISO: 408   F-number: 2.8
Focal length: 34.3 mm   (35 mm equivalent)
Exposure compensation: 1
Black at screen edge
Screen photo
[open image]
Luminance 0.21 cd/m2
Luminance spread 0.08 cd/m2 (2 standard deviations)
Exposure value –2.95 stops   (aim for –2 to –3)
Exposure spread 0.58 stops
Area used for calculation 0.495 x 0.495
Camera settings Exposure time: 1   ISO: 408   F-number: 2.8
Focal length: 34.3 mm   (35 mm equivalent)
Exposure compensation: 1

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.