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Contrast ratio of notebook samsung r428

Contrast ratio 139:1
Monitor model notebook samsung r428
Submitted 06 Jul 2013 15:48 CEST, by 117.65.*.*
Camera model Canon EOS 400D DIGITAL
Processing remarks

Note: image file 1: suggested exposure time: 0.5 s (Set EV to -1.1)

Black
Screen photo
[open image]
Luminance 1.26 cd/m2
Luminance spread 1.58 cd/m2 (2 standard deviations)
Exposure value –1.44 stops   (aim for –2 to –3)
Exposure spread 2.13 stops
Area used for calculation 0.39 x 0.439
Camera settings Exposure time: 1   ISO: 400   F-number: 4
Focal length: 28.1 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 175 cd/m2
Luminance spread 41 cd/m2 (2 standard deviations)
Exposure value –2.28 stops   (aim for –2 to –3)
Exposure spread 0.34 stops
Area used for calculation 0.39 x 0.439
Camera settings Exposure time: 1/250   ISO: 400   F-number: 4
Focal length: 28.1 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.