Contrast ratio of sony laptop

Contrast ratio 155:1
Monitor model sony laptop
Submitted 18 Jan 2012 11:14 CET, by 109.131.*.*
Camera model Canon PowerShot G9
Processing remarks

image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.

Black
Screen photo
Luminance 0.31 cd/m2
Luminance spread 0.57 cd/m2 (2 standard deviations)
Exposure value –3.46 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.488 x 0.488
Camera settings Exposure time: 0.5   ISO: 400   F-number: 2.8
Focal length: 33.8 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 47 cd/m2
Luminance spread 15 cd/m2 (2 standard deviations)
Exposure value –1.84 stops   (aim for –2 to –3)
Exposure spread 0.48 stops
Area used for calculation 0.488 x 0.488
Camera settings Exposure time: 1/101   ISO: 400   F-number: 2.8
Focal length: 33.8 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.