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

Contrast ratio results

Contrast ratio 4:1
Monitor model
Submitted 22 Nov 2009 19:37 CET, by 91.138.*.*
Camera model Nikon D300
Processing remarks

Warning: image file 1: camera was zoomed in too much.
Warning: image file 1: automatic white balance can cause inaccuracies.
Warning: image file 2: camera was zoomed in too much.
Warning: image file 2: automatic white balance can cause inaccuracies.

Black
Screen photo
[open image]
Luminance 7 cd/m2
Luminance spread 2 cd/m2 (2 standard deviations)
Exposure value –1.58 stops   (aim for –2 to –3)
Exposure spread 0.44 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1/8   ISO: 1   F-number: 5.6
Focal length: 300 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 31 cd/m2
Luminance spread 9 cd/m2 (2 standard deviations)
Exposure value –1.77 stops   (aim for –2 to –3)
Exposure spread 0.42 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1/40   ISO: 1   F-number: 5.6
Focal length: 300 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.