Contrast ratio results for Dell u2412m

Contrast ratio 457:1
Monitor model Dell u2412m
Submitted 15 Nov 2012 05:42 CET, by 206.248.*.*
Camera model Nikon D70s
Processing remarks

Warning: image file 1: Overexposed. Please decrease the shutter time.
Note: image file 1: suggested exposure time: 4.2 s (Set EV to -1.8)
Note: image file 2: suggested exposure time: 1/110 s (Set EV to -1.4)

Black
Screen photo
Luminance 0.11 cd/m2
Luminance spread 0.03 cd/m2 (2 standard deviations)
Exposure value –0.66 stops   (aim for –2 to –3)
Exposure spread 0.41 stops
Area used for calculation 0.375 x 0.423
Camera settings Exposure time: 15   ISO: 400   F-number: 3.5
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 51 cd/m2
Luminance spread 3 cd/m2 (2 standard deviations)
Exposure value –1.05 stops   (aim for –2 to –3)
Exposure spread 0.1 stops
Area used for calculation 0.375 x 0.423
Camera settings Exposure time: 1/40   ISO: 400   F-number: 3.5
Focal length: 27 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.