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Contrast ratio of ASUS U41SV

Contrast ratio 282:1 (edge: 333:1)
Monitor model ASUS U41SV
Submitted 01 Jul 2011 18:00 CEST, by 180.253.*.*
Camera model Canon EOS 40D
Processing remarks

Note: image file 1: suggested exposure time: 1.2 s (Set EV to -1.2)

Black
Screen photo
[open image]
Luminance 0.26 cd/m2
Luminance spread 0.3 cd/m2 (2 standard deviations)
Exposure value –1.34 stops   (aim for –2 to –3)
Exposure spread 1.97 stops
Area used for calculation 0.382 x 0.43
Camera settings Exposure time: 2.6   ISO: 400   F-number: 2.8
Focal length: 27.5 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 72 cd/m2
Luminance spread 26 cd/m2 (2 standard deviations)
Exposure value –3.2 stops   (aim for –2 to –3)
Exposure spread 0.53 stops
Area used for calculation 0.382 x 0.43
Camera settings Exposure time: 1/395   ISO: 400   F-number: 2.8
Focal length: 27.5 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.22 cd/m2
Luminance spread 0.27 cd/m2 (2 standard deviations)
Exposure value –1.58 stops   (aim for –2 to –3)
Exposure spread 2.16 stops
Area used for calculation 0.382 x 0.43
Camera settings Exposure time: 2.6   ISO: 400   F-number: 2.8
Focal length: 27.5 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.