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Contrast ratio of Zalman ZM-M240W

Contrast ratio 458:1
Monitor model Zalman ZM-M240W
Submitted 20 Jul 2010 09:50 CEST, by 71.117.*.*
Camera model Canon EOS DIGITAL REBEL
Processing remarks


Black
Screen photo
[open image]
Luminance 0.67 cd/m2
Luminance spread 0.75 cd/m2 (2 standard deviations)
Exposure value –1.64 stops   (aim for –2 to –3)
Exposure spread 1.81 stops
Area used for calculation 0.453 x 0.509
Camera settings Exposure time: 3.2   ISO: 400   F-number: 5.6
Focal length: 32.6 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 308 cd/m2
Luminance spread 38 cd/m2 (2 standard deviations)
Exposure value –1.8 stops   (aim for –2 to –3)
Exposure spread 0.18 stops
Area used for calculation 0.453 x 0.509
Camera settings Exposure time: 1/160   ISO: 400   F-number: 5.6
Focal length: 32.6 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.