Contrast ratio of w1942s

Contrast ratio 603:1
Monitor model w1942s
Submitted 06 Dec 2013 18:33 CET, by 130.25.*.*
Camera model Canon PowerShot A470
Processing remarks


Black
Screen photo
Luminance 0.28 cd/m2
Luminance spread 0.12 cd/m2 (2 standard deviations)
Exposure value –2.1 stops   (aim for –2 to –3)
Exposure spread 0.6 stops
Area used for calculation 0.542 x 0.542
Camera settings Exposure time: 1   ISO: 640   F-number: 3
Focal length: 37.5 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 169 cd/m2
Luminance spread 46 cd/m2 (2 standard deviations)
Exposure value –1.52 stops   (aim for –2 to –3)
Exposure spread 0.4 stops
Area used for calculation 0.542 x 0.542
Camera settings Exposure time: 1/403   ISO: 640   F-number: 3
Focal length: 37.5 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.