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Contrast ratio results for LG W2252V

Contrast ratio 1160:1
Monitor model LG W2252V
Submitted 16 Jan 2009 16:29 CET, by 77.70.*.*
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: 2.9 s (Set EV to +1.5)

Black
Screen photo
[open image]
Luminance 0.21 cd/m2
Luminance spread 0.08 cd/m2 (2 standard deviations)
Exposure value –4.02 stops   (aim for –2 to –3)
Exposure spread 0.56 stops
Area used for calculation 0.513 x 0.513
Camera settings Exposure time: 1   ISO: 200   F-number: 2.8
Focal length: 35.5 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 239 cd/m2
Luminance spread 20 cd/m2 (2 standard deviations)
Exposure value –2.5 stops   (aim for –2 to –3)
Exposure spread 0.12 stops
Area used for calculation 0.513 x 0.513
Camera settings Exposure time: 1/403   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.