Contrast ratio results

Contrast ratio 941:1
Monitor model
Submitted 27 Jun 2009 00:51 CEST, by 93.192.*.*
Camera model Canon EOS 450D
Processing remarks

Warning: image file 1: camera was zoomed out too much.
Note: image file 1: suggested exposure time: 14.4 s (Set EV to +1.5)
Warning: image file 2: camera was zoomed out too much.
image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.

Black
Screen photo
Luminance 0.22 cd/m2
Luminance spread 0.03 cd/m2 (2 standard deviations)
Exposure value –3.97 stops   (aim for –2 to –3)
Exposure spread 0.22 stops
Area used for calculation 0.1 x 0.112
Camera settings Exposure time: 5.2   ISO: 100   F-number: 4.6
Focal length: 1.3 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 209 cd/m2
Luminance spread 10 cd/m2 (2 standard deviations)
Exposure value –2.09 stops   (aim for –2 to –3)
Exposure spread 0.07 stops
Area used for calculation 0.1 x 0.112
Camera settings Exposure time: 1/49   ISO: 100   F-number: 4.6
Focal length: 1.3 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.