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Contrast ratio results for EW2440L

Contrast ratio 3411:1
Monitor model EW2440L
Submitted 18 Jan 2014 03:59 CET, by 184.97.*.*
Camera model Canon PowerShot SX100 IS
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 15.9 s (Set EV to +3.0)

Black
Screen photo
[open image]
Luminance 0.04 cd/m2
Luminance spread 0.03 cd/m2 (2 standard deviations)
Exposure value –5.49 stops   (aim for –2 to –3)
Exposure spread 1.19 stops
Area used for calculation 0.513 x 0.513
Camera settings Exposure time: 2   ISO: 200   F-number: 2.8
Focal length: 35.5 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 127 cd/m2
Luminance spread 14 cd/m2 (2 standard deviations)
Exposure value –3.06 stops   (aim for –2 to –3)
Exposure spread 0.16 stops
Area used for calculation 0.513 x 0.513
Camera settings Exposure time: 1/318   ISO: 200   F-number: 2.8
Focal length: 35.5 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.