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Contrast ratio results for Hannstar HSD140PHW1

Contrast ratio 304:1
Monitor model Hannstar HSD140PHW1
Submitted 17 Feb 2012 21:53 CET, by 201.220.*.*
Camera model Canon PowerShot A3100 IS
Processing remarks

image file 1: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.

Black
Screen photo
[open image]
Luminance 0.66 cd/m2
Luminance spread 0.45 cd/m2 (2 standard deviations)
Exposure value –2.98 stops   (aim for –2 to –3)
Exposure spread 1.03 stops
Area used for calculation 0.488 x 0.488
Camera settings Exposure time: 0.3   ISO: 400   F-number: 2.7
Focal length: 33.8 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 200 cd/m2
Luminance spread 57 cd/m2 (2 standard deviations)
Exposure value –1.65 stops   (aim for –2 to –3)
Exposure spread 0.41 stops
Area used for calculation 0.488 x 0.488
Camera settings Exposure time: 1/403   ISO: 400   F-number: 2.7
Focal length: 33.8 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.