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

Contrast ratio results for Dell 2209wa

Contrast ratio 696:1
Monitor model Dell 2209wa
Submitted 31 Mar 2009 04:07 CEST, by 190.50.*.*
Camera model Panasonic DMC-LZ7
Processing remarks

Warning: image file 1: automatic white balance can cause inaccuracies.

Black
Screen photo
[open image]
Luminance 0.22 cd/m2
Luminance spread 0.14 cd/m2 (2 standard deviations)
Exposure value –3.24 stops   (aim for –2 to –3)
Exposure spread 0.94 stops
Area used for calculation 0.534 x 0.534
Camera settings Exposure time: 3.2   ISO: 100   F-number: 2.8
Focal length: 37 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 155 cd/m2
Luminance spread 11 cd/m2 (2 standard deviations)
Exposure value –3.44 stops   (aim for –2 to –3)
Exposure spread 0.1 stops
Area used for calculation 0.534 x 0.534
Camera settings Exposure time: 1/250   ISO: 100   F-number: 2.8
Focal length: 37 mm   (35 mm equivalent)
Exposure compensation: -1.33

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.