Contrast ratio of Sony

Contrast ratio 518:1
Monitor model Sony
Submitted 06 Feb 2009 09:53 CET, by 71.164.*.*
Camera model Canon PowerShot SD870 IS
Processing remarks


Black
Screen photo
Luminance 0.3 cd/m2
Luminance spread 0.15 cd/m2 (2 standard deviations)
Exposure value –3.46 stops   (aim for –2 to –3)
Exposure spread 0.75 stops
Area used for calculation 0.393 x 0.393
Camera settings Exposure time: 1   ISO: 200   F-number: 2.8
Focal length: 27.2 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 158 cd/m2
Luminance spread 16 cd/m2 (2 standard deviations)
Exposure value –1.76 stops   (aim for –2 to –3)
Exposure spread 0.14 stops
Area used for calculation 0.393 x 0.393
Camera settings Exposure time: 1/159   ISO: 200   F-number: 2.8
Focal length: 27.2 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.