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Contrast ratio of ggg

Contrast ratio 479:1
Monitor model ggg
Submitted 30 Jan 2010 19:46 CET, by 74.14.*.*
Camera model Canon PowerShot S2 IS
Processing remarks


Black
Screen photo
[open image]
Luminance 0.43 cd/m2
Luminance spread 0.16 cd/m2 (2 standard deviations)
Exposure value –1.86 stops   (aim for –2 to –3)
Exposure spread 0.54 stops
Area used for calculation 0.514 x 0.514
Camera settings Exposure time: 1   ISO: 400   F-number: 2.7
Focal length: 35.6 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 206 cd/m2
Luminance spread 19 cd/m2 (2 standard deviations)
Exposure value –1.61 stops   (aim for –2 to –3)
Exposure spread 0.13 stops
Area used for calculation 0.514 x 0.514
Camera settings Exposure time: 1/403   ISO: 400   F-number: 2.7
Focal length: 35.6 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.