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Contrast ratio results for Dell U3011

Contrast ratio 1222:1 (edge: 1614:1)
Monitor model Dell U3011
Submitted 29 Oct 2012 21:03 CET, by 108.88.*.*
Camera model Nikon D800
Processing remarks

Note: image file 1: suggested exposure time: 2.2 s (Set EV to +1.1)
Warning: image file 3: Underexposed. Please increase the shutter time.
Note: image file 3: suggested exposure time: 2.9 s (Set EV to +1.5)
Warning: Image focal lengths/zoom levels are not the same.

Black
Screen photo
[open image]
Luminance 0.14 cd/m2
Luminance spread 0.08 cd/m2 (2 standard deviations)
Exposure value –3.61 stops   (aim for –2 to –3)
Exposure spread 0.88 stops
Area used for calculation 0.695 x 0.781
Camera settings Exposure time: 1   ISO: 400   F-number: 2.8
Focal length: 50 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 168 cd/m2
Luminance spread 61 cd/m2 (2 standard deviations)
Exposure value –2 stops   (aim for –2 to –3)
Exposure spread 0.53 stops
Area used for calculation 0.667 x 0.749
Camera settings Exposure time: 1/400   ISO: 400   F-number: 2.8
Focal length: 48 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.1 cd/m2
Luminance spread 0.08 cd/m2 (2 standard deviations)
Exposure value –4.01 stops   (aim for –2 to –3)
Exposure spread 1.13 stops
Area used for calculation 0.667 x 0.749
Camera settings Exposure time: 1   ISO: 400   F-number: 2.8
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.