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

Contrast ratio results

Contrast ratio 586:1 (edge: 658:1)
Monitor model
Submitted 15 Sep 2012 22:21 CEST, by 82.173.*.*
Camera model Nikon D200
Processing remarks

Warning: image file 2: Overexposed. Please decrease the shutter time.

Black
Screen photo
[open image]
Luminance 0.5 cd/m2
Luminance spread 0.12 cd/m2 (2 standard deviations)
Exposure value –2.31 stops   (aim for –2 to –3)
Exposure spread 0.36 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1/4   ISO: 400   F-number: 1.7
Focal length: 75 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 291 cd/m2
Luminance spread 36 cd/m2 (2 standard deviations)
Exposure value –0.09 stops   (aim for –2 to –3)
Exposure spread 0.18 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1/500   ISO: 400   F-number: 1.7
Focal length: 75 mm   (35 mm equivalent)
Exposure compensation: 2
Black at screen edge
Screen photo
[open image]
Luminance 0.44 cd/m2
Luminance spread 0.1 cd/m2 (2 standard deviations)
Exposure value –2.48 stops   (aim for –2 to –3)
Exposure spread 0.32 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1/4   ISO: 400   F-number: 1.7
Focal length: 75 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.