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

Contrast ratio of Dell Inspiron 6400 Generic LCD Display

Contrast ratio 244:1
Monitor model Dell Inspiron 6400 Generic LCD Display
Submitted 21 May 2008 16:26 CEST, by 190.142.*.*
Camera model Canon EOS 400D DIGITAL
Processing remarks


Black
Screen photo
[open image]
Luminance 0.4 cd/m2
Luminance spread 0.55 cd/m2 (2 standard deviations)
Exposure value –1.7 stops   (aim for –2 to –3)
Exposure spread 2.49 stops
Area used for calculation 0.607 x 0.684
Camera settings Exposure time: 1.3   ISO: 400   F-number: 2.8
Focal length: 43.7 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 97 cd/m2
Luminance spread 23 cd/m2 (2 standard deviations)
Exposure value –2.47 stops   (aim for –2 to –3)
Exposure spread 0.34 stops
Area used for calculation 0.607 x 0.684
Camera settings Exposure time: 1/320   ISO: 400   F-number: 2.8
Focal length: 43.7 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.