Contrast ratio of Dell U2311H

Black
Contrast ratio	944:1 (edge: 904:1)
Monitor model	Dell U2311H
Submitted	19 Oct 2014 09:05 CEST, by 141.2..
Camera model	Pentax K-30
Processing remarks
Screen photo	[open image]
Luminance	0.19 cd/m2
Luminance spread	0.08 cd/m2 (2 standard deviations)
Exposure value	–2.76 stops (aim for –2 to –3)
Exposure spread	0.58 stops
Area used for calculation	0.375 x 0.422
Camera settings	Exposure time: 2 ISO: 400 F-number: 3.5 Focal length: 27 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	183 cd/m2
Luminance spread	28 cd/m2 (2 standard deviations)
Exposure value	–2.52 stops (aim for –2 to –3)
Exposure spread	0.22 stops
Area used for calculation	0.375 x 0.422
Camera settings	Exposure time: 1/400 ISO: 400 F-number: 3.5 Focal length: 27 mm (35 mm equivalent) Exposure compensation: 0
Black at screen edge
Screen photo	[open image]
Luminance	0.2 cd/m2
Luminance spread	0.12 cd/m2 (2 standard deviations)
Exposure value	–2.69 stops (aim for –2 to –3)
Exposure spread	0.87 stops
Area used for calculation	0.375 x 0.422
Camera settings	Exposure time: 2 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.