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

Contrast ratio of Samsung notebook

Contrast ratio 233:1 (edge: 249:1)
Monitor model Samsung notebook
Submitted 05 Jul 2017 16:33 CEST, by 190.175.*.*
Camera model Nikon D5200
Processing remarks


Black
Screen photo
[open image]
Luminance 0.31 cd/m2
Luminance spread 0.42 cd/m2 (2 standard deviations)
Exposure value –1.76 stops   (aim for –2 to –3)
Exposure spread 2.41 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1.6   ISO: 400   F-number: 2.8
Focal length: 75 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 72 cd/m2
Luminance spread 13 cd/m2 (2 standard deviations)
Exposure value –2.22 stops   (aim for –2 to –3)
Exposure spread 0.25 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1/200   ISO: 400   F-number: 2.8
Focal length: 75 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.29 cd/m2
Luminance spread 0.41 cd/m2 (2 standard deviations)
Exposure value –1.85 stops   (aim for –2 to –3)
Exposure spread 2.5 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1.6   ISO: 400   F-number: 2.8
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.