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Contrast ratio results for VIewSonic

Contrast ratio 1349:1
Monitor model VIewSonic
Submitted 30 Jan 2010 19:56 CET, by 74.14.*.*
Camera model Canon PowerShot S2 IS
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 3.4 s (Set EV to +2.8)

Black
Screen photo
[open image]
Luminance 0.16 cd/m2
Luminance spread 0.1 cd/m2 (2 standard deviations)
Exposure value –5.25 stops   (aim for –2 to –3)
Exposure spread 0.91 stops
Area used for calculation 0.514 x 0.514
Camera settings Exposure time: 0.5   ISO: 200   F-number: 2.7
Focal length: 35.6 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 221 cd/m2
Luminance spread 23 cd/m2 (2 standard deviations)
Exposure value –1.51 stops   (aim for –2 to –3)
Exposure spread 0.15 stops
Area used for calculation 0.514 x 0.514
Camera settings Exposure time: 1/202   ISO: 200   F-number: 2.7
Focal length: 35.6 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.