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Contrast ratio of Toshiba Satellite M35X-S161 (laptop)

Contrast ratio 257:1
Monitor model Toshiba Satellite M35X-S161 (laptop)
Submitted 29 Aug 2008 14:28 CEST, by 70.95.*.*
Camera model Canon PowerShot SD550
Processing remarks


Black
Screen photo
[open image]
Luminance 0.5 cd/m2
Luminance spread 0.85 cd/m2 (2 standard deviations)
Exposure value –3.06 stops   (aim for –2 to –3)
Exposure spread 3.53 stops
Area used for calculation 0.521 x 0.521
Camera settings Exposure time: 0.8   ISO: 200   F-number: 2.8
Focal length: 36.1 mm   (35 mm equivalent)
Exposure compensation: 2
White
Screen photo
[open image]
Luminance 129 cd/m2
Luminance spread 24 cd/m2 (2 standard deviations)
Exposure value –2.7 stops   (aim for –2 to –3)
Exposure spread 0.27 stops
Area used for calculation 0.521 x 0.521
Camera settings Exposure time: 1/251   ISO: 200   F-number: 2.8
Focal length: 36.1 mm   (35 mm equivalent)
Exposure compensation: -2

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.