Contrast ratio of Dell U2410f

Black
Contrast ratio	661:1 (edge: 737:1)
Monitor model	Dell U2410f
Submitted	25 Jan 2010 20:55 CET, by 78.53..
Camera model	Sony DSLR-A700
Processing remarks
Screen photo	[open image]
Luminance	0.18 cd/m2
Luminance spread	0.06 cd/m2 (2 standard deviations)
Exposure value	–1.95 stops (aim for –2 to –3)
Exposure spread	0.48 stops
Area used for calculation	0.542 x 0.608
Camera settings	Exposure time: 5 ISO: 400 F-number: 4 Focal length: 39 mm (35 mm equivalent) Exposure compensation: -1
White
Screen photo	[open image]
Luminance	117 cd/m2
Luminance spread	13 cd/m2 (2 standard deviations)
Exposure value	–2.23 stops (aim for –2 to –3)
Exposure spread	0.17 stops
Area used for calculation	0.542 x 0.608
Camera settings	Exposure time: 1/160 ISO: 400 F-number: 4 Focal length: 39 mm (35 mm equivalent) Exposure compensation: -1
Black at screen edge
Screen photo	[open image]
Luminance	0.16 cd/m2
Luminance spread	0.06 cd/m2 (2 standard deviations)
Exposure value	–2.11 stops (aim for –2 to –3)
Exposure spread	0.56 stops
Area used for calculation	0.542 x 0.608
Camera settings	Exposure time: 5 ISO: 400 F-number: 4 Focal length: 39 mm (35 mm equivalent) Exposure compensation: -1

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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.