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

Contrast ratio results for Dell u2311h

Contrast ratio 688:1
Monitor model Dell u2311h
Submitted 09 Aug 2010 18:13 CEST, by 89.182.*.*
Camera model Canon EOS 30D
Processing remarks

Warning: image file 1: camera was zoomed in too much.
Note: image file 1: suggested exposure time: 3.5 s (Set EV to +1.1)
Warning: image file 2: camera was zoomed in too much.
Note: image file 2: suggested exposure time: 1/200 s (Set EV to +1.0)

Black
Screen photo
[open image]
Luminance 0.34 cd/m2
Luminance spread 0.16 cd/m2 (2 standard deviations)
Exposure value –3.63 stops   (aim for –2 to –3)
Exposure spread 0.7 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1.6   ISO: 400   F-number: 5.6
Focal length: 85.9 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 233 cd/m2
Luminance spread 79 cd/m2 (2 standard deviations)
Exposure value –3.53 stops   (aim for –2 to –3)
Exposure spread 0.5 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1/400   ISO: 400   F-number: 5.6
Focal length: 85.9 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.