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Contrast ratio results for BenQ EW2430

Contrast ratio 4928:1
Monitor model BenQ EW2430
Submitted 23 Nov 2011 18:58 CET, by 88.196.*.*
Camera model Canon IXUS 115 HS
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 17.5 s (Set EV to +3.1)

Black
Screen photo
[open image]
Luminance 0.02 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –6.63 stops   (aim for –2 to –3)
Exposure spread 2.21 stops
Area used for calculation 0.403 x 0.403
Camera settings Exposure time: 1   ISO: 400   F-number: 2.8
Focal length: 27.9 mm   (35 mm equivalent)
Exposure compensation: -1
White
Screen photo
[open image]
Luminance 84 cd/m2
Luminance spread 10 cd/m2 (2 standard deviations)
Exposure value –1.67 stops   (aim for –2 to –3)
Exposure spread 0.17 stops
Area used for calculation 0.403 x 0.403
Camera settings Exposure time: 1/159   ISO: 400   F-number: 2.8
Focal length: 27.9 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.