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Contrast ratio of Hazro

Contrast ratio 312:1
Monitor model Hazro
Submitted 12 Oct 2008 19:47 CEST, by 82.25.*.*
Camera model Canon EOS 40D
Processing remarks


Black
Screen photo
[open image]
Luminance 0.31 cd/m2
Luminance spread 0.19 cd/m2 (2 standard deviations)
Exposure value –3.41 stops   (aim for –2 to –3)
Exposure spread 0.92 stops
Area used for calculation 0.382 x 0.43
Camera settings Exposure time: 0.5   ISO: 400   F-number: 2.8
Focal length: 27.5 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 98 cd/m2
Luminance spread 14 cd/m2 (2 standard deviations)
Exposure value –3.13 stops   (aim for –2 to –3)
Exposure spread 0.21 stops
Area used for calculation 0.382 x 0.43
Camera settings Exposure time: 1/512   ISO: 400   F-number: 2.8
Focal length: 27.5 mm   (35 mm equivalent)
Exposure compensation: 0
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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.