Contrast ratio results

Contrast ratio 7674:1
Monitor model
Submitted 04 Jan 2009 06:11 CET, by 24.85.*.*
Camera model Canon PowerShot S5 IS
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 53.7 s (Set EV to +14.4)
image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Note: image file 2: suggested exposure time: 1/140 s (Set EV to +1.5)

Black
Screen photo
Luminance 0.02 cd/m2
Luminance spread 0.05 cd/m2 (2 standard deviations)
Exposure value –16.9 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.513 x 0.513
Camera settings Exposure time: 1/403   ISO: 400   F-number: 5
Focal length: 35.5 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 135 cd/m2
Luminance spread 27 cd/m2 (2 standard deviations)
Exposure value –4 stops   (aim for –2 to –3)
Exposure spread 0.29 stops
Area used for calculation 0.513 x 0.513
Camera settings Exposure time: 1/403   ISO: 400   F-number: 5
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.