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

Contrast ratio results

Contrast ratio 209:1
Monitor model
Submitted 04 Oct 2010 14:15 CEST, by 79.186.*.*
Camera model Nikon D90
Processing remarks

Note: image file 1: suggested exposure time: 0.5 s (Set EV to +1.3)

Black
Screen photo
[open image]
Luminance 0.94 cd/m2
Luminance spread 1.57 cd/m2 (2 standard deviations)
Exposure value –3.8 stops   (aim for –2 to –3)
Exposure spread 3.46 stops
Area used for calculation 0.375 x 0.423
Camera settings Exposure time: 1/5   ISO: 400   F-number: 3.5
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 196 cd/m2
Luminance spread 41 cd/m2 (2 standard deviations)
Exposure value –2.42 stops   (aim for –2 to –3)
Exposure spread 0.3 stops
Area used for calculation 0.375 x 0.423
Camera settings Exposure time: 1/400   ISO: 400   F-number: 3.5
Focal length: 27 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.