Contrast ratio | Test results | LCD test | Small-screen tests | Lagom home

Contrast ratio of Dell U2311H

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


Black
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
{adcode}

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.