Contrast ratio results for dell u2311h

Black
Contrast ratio	1.55792e+08:1
Monitor model	dell u2311h
Submitted	03 Jul 2011 12:46 CEST, by 178.73..
Camera model	Nikon D50
Processing remarks	Warning: image file 1: automatic white balance can cause inaccuracies. Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 1210111.5 s (Set EV to +27.5) Warning: image file 2: automatic white balance can cause inaccuracies. Warning: image file 3: automatic white balance can cause inaccuracies. image file 3: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen. Note: image file 3: suggested exposure time: 1/57 s (Set EV to +1.5) Warning: image file 3 is too bright to be a dark photo. Maybe you mixed up the files?
Screen photo	[open image]
Luminance	0 cd/m2
Luminance spread	0 cd/m2 (2 standard deviations)
Exposure value	–30.03 stops (aim for –2 to –3)
Exposure spread	4.25 stops
Area used for calculation	0.666 x 0.751
Camera settings	Exposure time: 1/160 ISO: 400 F-number: 5 Focal length: 48 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	122 cd/m2
Luminance spread	52 cd/m2 (2 standard deviations)
Exposure value	–2.81 stops (aim for –2 to –3)
Exposure spread	0.63 stops
Area used for calculation	0.666 x 0.751
Camera settings	Exposure time: 1/160 ISO: 400 F-number: 5 Focal length: 48 mm (35 mm equivalent) Exposure compensation: 0
Black at screen edge
Screen photo	[open image]
Luminance	54 cd/m2
Luminance spread	110 cd/m2 (2 standard deviations)
Exposure value	–3.99 stops (aim for –2 to –3)
Exposure spread	4.25 stops
Area used for calculation	0.666 x 0.751
Camera settings	Exposure time: 1/160 ISO: 400 F-number: 5 Focal length: 48 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.