Contrast ratio results for Dell UltraSharp 2209WA

Contrast ratio 858:1
Monitor model Dell UltraSharp 2209WA
Submitted 26 May 2010 21:18 CEST, by 189.55.*.*
Camera model Canon EOS 50D
Processing remarks

Warning: image file 1: camera was zoomed in too much.
Note: image file 1: suggested exposure time: 0.7 s (Set EV to -1.1)
Warning: image file 2: camera was zoomed in too much.

Black
Screen photo
Luminance 0.41 cd/m2
Luminance spread 0.05 cd/m2 (2 standard deviations)
Exposure value –1.36 stops   (aim for –2 to –3)
Exposure spread 0.17 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1.6   ISO: 400   F-number: 2.8
Focal length: 291 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 351 cd/m2
Luminance spread 30 cd/m2 (2 standard deviations)
Exposure value –0.91 stops   (aim for –2 to –3)
Exposure spread 0.12 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1/395   ISO: 400   F-number: 2.8
Focal length: 291 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.