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

Contrast ratio results for samsung 943nwx

Contrast ratio 862:1 (edge: 1206:1)
Monitor model samsung 943nwx
Submitted 19 Dec 2010 08:45 CET, by 189.160.*.*
Camera model Nikon D40
Processing remarks

Note: image file 1: suggested exposure time: 5.2 s (Set EV to +0.4)
Warning: image file 3: Underexposed. Please increase the shutter time.
Note: image file 3: suggested exposure time: 7.3 s (Set EV to +0.9)

Black
Screen photo
[open image]
Luminance 0.09 cd/m2
Luminance spread 0.04 cd/m2 (2 standard deviations)
Exposure value –3.89 stops   (aim for –2 to –3)
Exposure spread 0.64 stops
Area used for calculation 0.375 x 0.423
Camera settings Exposure time: 2   ISO: 400   F-number: 3.5
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: -1
White
Screen photo
[open image]
Luminance 76 cd/m2
Luminance spread 19 cd/m2 (2 standard deviations)
Exposure value –3.46 stops   (aim for –2 to –3)
Exposure spread 0.36 stops
Area used for calculation 0.375 x 0.423
Camera settings Exposure time: 1/320   ISO: 400   F-number: 3.5
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: -1
Black at screen edge
Screen photo
[open image]
Luminance 0.06 cd/m2
Luminance spread 0.04 cd/m2 (2 standard deviations)
Exposure value –4.37 stops   (aim for –2 to –3)
Exposure spread 0.93 stops
Area used for calculation 0.375 x 0.423
Camera settings Exposure time: 2   ISO: 400   F-number: 3.5
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: -1

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.