Contrast ratio results for Dell U2412M

Black
Contrast ratio	480:1
Monitor model	Dell U2412M
Submitted	27 Dec 2012 10:25 CET, by 83.228..
Camera model	Fujifilm X10
Processing remarks	Warning: image file 1: camera was zoomed in too much. Warning: image file 1: automatic white balance can cause inaccuracies. Warning: image file 2: automatic white balance can cause inaccuracies. Warning: Image ISO settings are not the same. Warning: Image F-number settings are not the same. Warning: Image focal lengths/zoom levels are not the same.
Screen photo	[open image]
Luminance	0.28 cd/m2
Luminance spread	0.19 cd/m2 (2 standard deviations)
Exposure value	–2.57 stops (aim for –2 to –3)
Exposure spread	1.02 stops
Area used for calculation	1 x 1
Camera settings	Exposure time: 1/10 ISO: 3200 F-number: 2.5 Focal length: 79.2 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	135 cd/m2
Luminance spread	35 cd/m2 (2 standard deviations)
Exposure value	–2.18 stops (aim for –2 to –3)
Exposure spread	0.37 stops
Area used for calculation	0.835 x 0.835
Camera settings	Exposure time: 1/148 ISO: 100 F-number: 2.2 Focal length: 57.8 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.