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

Contrast ratio results

Contrast ratio 366:1 (edge: 408:1)
Monitor model
Submitted 24 Dec 2010 05:41 CET, by 92.47.*.*
Camera model Nikon D90
Processing remarks


Black
Screen photo
[open image]
Luminance 1.06 cd/m2
Luminance spread 1.86 cd/m2 (2 standard deviations)
Exposure value –2.18 stops   (aim for –2 to –3)
Exposure spread 3.95 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 0.7   ISO: 200   F-number: 2.8
Focal length: 75 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 388 cd/m2
Luminance spread 81 cd/m2 (2 standard deviations)
Exposure value –2.11 stops   (aim for –2 to –3)
Exposure spread 0.3 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1/500   ISO: 200   F-number: 2.8
Focal length: 75 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.95 cd/m2
Luminance spread 1.63 cd/m2 (2 standard deviations)
Exposure value –2.33 stops   (aim for –2 to –3)
Exposure spread 3.69 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 0.7   ISO: 200   F-number: 2.8
Focal length: 75 mm   (35 mm equivalent)
Exposure compensation: 0
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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.