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Contrast ratio of Macbook unibody late 2008 with 9CA8 disp

Contrast ratio 550:1
Monitor model Macbook unibody late 2008 with 9CA8 disp
Submitted 17 Apr 2010 21:52 CEST, by 89.250.*.*
Camera model Canon PowerShot S3 IS
Processing remarks


Black
Screen photo
[open image]
Luminance 0.12 cd/m2
Luminance spread 0.1 cd/m2 (2 standard deviations)
Exposure value –2.16 stops   (aim for –2 to –3)
Exposure spread 1.35 stops
Area used for calculation 0.513 x 0.513
Camera settings Exposure time: 15   ISO: 80   F-number: 2.7
Focal length: 35.5 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 64 cd/m2
Luminance spread 15 cd/m2 (2 standard deviations)
Exposure value –2.28 stops   (aim for –2 to –3)
Exposure spread 0.34 stops
Area used for calculation 0.513 x 0.513
Camera settings Exposure time: 1/40   ISO: 80   F-number: 2.7
Focal length: 35.5 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.