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

Contrast ratio results

Contrast ratio 635:1
Monitor model
Submitted 14 Dec 2014 16:22 CET, by 195.238.*.*
Camera model Nikon COOLPIX P510
Processing remarks


Black
Screen photo
[open image]
Luminance 0.13 cd/m2
Luminance spread 0.03 cd/m2 (2 standard deviations)
Exposure value –2.43 stops   (aim for –2 to –3)
Exposure spread 0.3 stops
Area used for calculation 0.722 x 0.722
Camera settings Exposure time: 4   ISO: 400   F-number: 3.6
Focal length: 50 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 82 cd/m2
Luminance spread 20 cd/m2 (2 standard deviations)
Exposure value –2.44 stops   (aim for –2 to –3)
Exposure spread 0.36 stops
Area used for calculation 0.722 x 0.722
Camera settings Exposure time: 1/160   ISO: 400   F-number: 3.6
Focal length: 50 mm   (35 mm equivalent)
Exposure compensation: -0.7

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.