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

Contrast ratio results for Dell U2311H

Contrast ratio 482:1 (edge: 364:1)
Monitor model Dell U2311H
Submitted 12 Jul 2011 01:20 CEST, by 145.116.*.*
Camera model SAMSUNG WB2000
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 5.3 s (Set EV to +2.4)
Warning: image file 2: Underexposed. Please increase the shutter time.
Note: image file 2: suggested exposure time: 1/91 s (Set EV to +2.5)
Warning: image file 3: Underexposed. Please increase the shutter time.
Note: image file 3: suggested exposure time: 4.0 s (Set EV to +2.0)

Black
Screen photo
[open image]
Luminance 0.06 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –4.91 stops   (aim for –2 to –3)
Exposure spread 0.41 stops
Area used for calculation 0.347 x 0.347
Camera settings Exposure time: 1   ISO: 400   F-number: 2.8
Focal length: 24 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 27 cd/m2
Luminance spread 4 cd/m2 (2 standard deviations)
Exposure value –4.96 stops   (aim for –2 to –3)
Exposure spread 0.22 stops
Area used for calculation 0.347 x 0.347
Camera settings Exposure time: 1/500   ISO: 400   F-number: 2.8
Focal length: 24 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.07 cd/m2
Luminance spread 0.05 cd/m2 (2 standard deviations)
Exposure value –4.51 stops   (aim for –2 to –3)
Exposure spread 0.97 stops
Area used for calculation 0.347 x 0.347
Camera settings Exposure time: 1   ISO: 400   F-number: 2.8
Focal length: 24 mm   (35 mm equivalent)
Exposure compensation: 0
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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.