Contrast ratio of toshiba portege z830

Contrast ratio 134:1
Monitor model toshiba portege z830
Submitted 13 Jan 2014 00:04 CET, by 2.86.*.*
Camera model Sony DSLR-A100
Processing remarks


Black
Screen photo
Luminance 2.21 cd/m2
Luminance spread 3.06 cd/m2 (2 standard deviations)
Exposure value –2.25 stops   (aim for –2 to –3)
Exposure spread 2.46 stops
Area used for calculation 0.381 x 0.428
Camera settings Exposure time: 1/4   ISO: 400   F-number: 3.5
Focal length: 27.4 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 297 cd/m2
Luminance spread 59 cd/m2 (2 standard deviations)
Exposure value –2.14 stops   (aim for –2 to –3)
Exposure spread 0.29 stops
Area used for calculation 0.381 x 0.428
Camera settings Exposure time: 1/500   ISO: 400   F-number: 3.5
Focal length: 27.4 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.