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Contrast ratio results for l227wtg

Contrast ratio 1259:1 (edge: 2280:1)
Monitor model l227wtg
Submitted 27 Sep 2010 18:50 CEST, by 71.231.*.*
Camera model Canon EOS REBEL T2i
Processing remarks

Warning: image file 1: camera was zoomed out too much.
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 5.5 s (Set EV to +2.1)
Warning: image file 2: camera was zoomed out too much.
Warning: image file 3: camera was zoomed out too much.
Warning: image file 3: Underexposed. Please increase the shutter time.
Note: image file 3: suggested exposure time: 10.0 s (Set EV to +2.9)

Black
Screen photo
[open image]
Luminance 0.08 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –4.59 stops   (aim for –2 to –3)
Exposure spread 0.33 stops
Area used for calculation 0.1 x 0.113
Camera settings Exposure time: 1.3   ISO: 400   F-number: 3.5
Focal length: 1.4 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 106 cd/m2
Luminance spread 8 cd/m2 (2 standard deviations)
Exposure value –3.04 stops   (aim for –2 to –3)
Exposure spread 0.12 stops
Area used for calculation 0.1 x 0.113
Camera settings Exposure time: 1/332   ISO: 400   F-number: 3.5
Focal length: 1.4 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.05 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –5.44 stops   (aim for –2 to –3)
Exposure spread 0.29 stops
Area used for calculation 0.1 x 0.113
Camera settings Exposure time: 1.3   ISO: 400   F-number: 3.5
Focal length: 1.4 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.