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

Contrast ratio of Dell U2311H

Contrast ratio 869:1 (edge: 904:1)
Monitor model Dell U2311H
Submitted 12 Jul 2011 01:33 CEST, by 145.116.*.*
Camera model SAMSUNG WB2000
Processing remarks

Note: image file 2: suggested exposure time: 1/380 s (Set EV to -1.1)

Black
Screen photo
[open image]
Luminance 0.1 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –2.69 stops   (aim for –2 to –3)
Exposure spread 0.17 stops
Area used for calculation 0.347 x 0.347
Camera settings Exposure time: 2   ISO: 400   F-number: 2.4
Focal length: 24 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 83 cd/m2
Luminance spread 7 cd/m2 (2 standard deviations)
Exposure value –1.41 stops   (aim for –2 to –3)
Exposure spread 0.12 stops
Area used for calculation 0.347 x 0.347
Camera settings Exposure time: 1/180   ISO: 400   F-number: 2.4
Focal length: 24 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.09 cd/m2
Luminance spread 0.04 cd/m2 (2 standard deviations)
Exposure value –2.74 stops   (aim for –2 to –3)
Exposure spread 0.61 stops
Area used for calculation 0.347 x 0.347
Camera settings Exposure time: 2   ISO: 400   F-number: 2.4
Focal length: 24 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.