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Contrast ratio results for Canon PowerShot S3 IS

Contrast ratio 2184:1
Monitor model Canon PowerShot S3 IS
Submitted 28 May 2010 02:30 CEST, by 70.67.*.*
Camera model Canon PowerShot S3 IS
Processing remarks

Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.
Note: image file 2: suggested exposure time: 1/380 s (Set EV to +1.1)

Black
Screen photo
[open image]
Luminance 0.05 cd/m2
Luminance spread 0.03 cd/m2 (2 standard deviations)
Exposure value –3.03 stops   (aim for –2 to –3)
Exposure spread 1.05 stops
Area used for calculation 0.513 x 0.513
Camera settings Exposure time: 4   ISO: 400   F-number: 2.7
Focal length: 35.5 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 104 cd/m2
Luminance spread 20 cd/m2 (2 standard deviations)
Exposure value –3.59 stops   (aim for –2 to –3)
Exposure spread 0.28 stops
Area used for calculation 0.513 x 0.513
Camera settings Exposure time: 1/807   ISO: 400   F-number: 2.7
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.