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Contrast ratio results for dell U2711

Contrast ratio 58809:1
Monitor model dell U2711
Submitted 26 Dec 2011 20:48 CET, by 213.112.*.*
Camera model Canon EOS 5D Mark II
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: 124.5 s (Set EV to +15.6)
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.
Warning: image file 2: Overexposed. Please decrease the shutter time.
Note: image file 2: suggested exposure time: 1/470 s (Set EV to -2.3)
Warning: Image focal lengths/zoom levels are not the same.

Black
Screen photo
[open image]
Luminance 0 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –18.09 stops   (aim for –2 to –3)
Exposure spread 2.2 stops
Area used for calculation 0.1 x 0.113
Camera settings Exposure time: 1/395   ISO: 400   F-number: 2.8
Focal length: 0.6 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 140 cd/m2
Luminance spread 1 cd/m2 (2 standard deviations)
Exposure value –0.24 stops   (aim for –2 to –3)
Exposure spread 0.01 stops
Area used for calculation 0.1 x 0.113
Camera settings Exposure time: 1/99   ISO: 400   F-number: 2.8
Focal length: 0.6 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.